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Insta nst allation user’s manual manual version 1.3
WT 60 B A SE ANA A NAL L OG OUTPUT
EN55022 IEC 65A/77B(sec 65A/77B (sec)121/88 )121/88 IEC 801-2 IEC 801-4
INSTRUMENT IDENTIFICATION
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SYMBOLS The following symbols are used in the manual to draw the reader’s attention to important points:
Caution! Risk of of electric electric shock! shock! Caution! This operation must be performed by specialist personnel. Pay particular attention to the following points. Further inform informati ation. on.
TABLE TAB LE OF CONTENTS RECOMMENDATION RECOMMENDATIONS S FOR CORRECT CORRECT INSTALLATION INSTALL ATION ............. .................... .............. .............. .............. .............. ............. ............. ........... 1 INSTRUMENT OPERATION ........................................................... ............................................................................................................. .................................................... 1 TECHNICAL FEATURES ........................................................ ................................................................................................................... ........................................................... 2 EL ECTR EC TRIC ICA A L CONN CO NNEC ECTI TION ONS S ............. ................... ............. ............. ............. ............. ............. ............. ............. ............. ............. ............. ............. ........... ....33 - 4 CHANGING VOLTAGE VOLTA GE 230 / 115 VAC ....................................................... ........................................................................................... .................................... 4 STARTING PROCESS ............................................................ ...................................................................................................................... ............................................................ 5 TARE ZERO-SETTING ............................................................................................... ...................... 5 INSTRUMENT INSTRUMENT ALREADY A LREADY CALIBRATED CAL IBRATED IN LABORATORY...... LA BORATORY............. .............. .............. ............. ............. .............. .............. ............ ..... 6 INSTRUMENT INSTRUMENT NOT CALIBRATED CALIB RATED ............. .................... .............. ............. ............. .............. .............. .............. .............. ............. ............. .............. .............. ........... .... 7 THEORICAL THEORICAL CALIBRATION CALIB RATION ............. .................... .............. ............. ............. .............. ............. ............. ............. ............. .............. ............. ............. .............. .............. ........... 8 CALIBRA CAL IBRATION TION WITH SAMPLE SAMPL E WEIGHT ....................................................... ......................................................................................... .................................. 9 SET POINT AND HYSTERESIS PROGRAMMING ..................................................... ......................................................................... .................... 10 WEIGHT ZERO-SETTING FOR LITTLE LITTL E CHANGES .................................................. ....................................................................... ..................... 11 PASSWORD .......................................................... ...................................................................................................................... ........................................................................... ............... 12 KEYS' FUNCTION............................................................ FUNCTION ................................................................................................................. ................................................................ ........... 13 OVERVIEW OF SET-UP MENU................................................................................................14 - 16 SET-UP MENU (PROGRAMMING)...........................................................................................17 - 23 ANALOG ANA LOG OUTPUT........................................................................................... OUTPUT.............................. ............................................................................................. ................................ 24 ALARMS AL ARMS.......................................................................... .......................................................................... .............................................. ................... 25 PRINT .......................................................................... ................................................ ..................................................................... ..................... 26 COMMUNICATION PROTOCOL .................................................. .............................................................................................. ............................................ 27 - 33 MODBUS RTU PROTOCOL ............................................................. ..................................................................................................... ........................................ 34 - 37 RS 232 CONNECTION CABLE CAB LE BETWEEN WT60 AND PC.................................................... PC ........................................................... ....... 38 CONNECTION CONNECTION CABLE CAB LE FOR 24COLUMN 24COLUMN PRINTER PRINTER (MODEL (MODEL P190) ............. .................... .............. .............. .............. ......... 38 RS 422 CONNECTION AMONG INSTRUMENTS WT60 WITH CONVERTER RS 232 ................. 39 RS 485 CONNECTION AMONG INSTRUMENTS INSTRUMENTS WT60 .................................................. ................................................................ .............. 40
RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHT INDICATORS -
The entry into the cable board of cells must be independent ( on one side or the other of the board ) and directly connected to the terminal board of the device without breaking by bearing terminal boards or passing through troughs containing other cables.
-
Use the " RC " filters on the instrument-driven coils of the remote control switches.
-
Av Avoid inv inverter ter, if ine inevita itable, le, use filt filte ers and separate with ith sheets. ts.
-
In case of 230Vac supply, use a 380/230Vac transformer avoiding to use the 380Vac phase and the neutral.
-
The installer of the board is responsible for securing the electrical safety of the indicators.
-
It is a good norm to let the indicators always switch on to prevent the formation of condensation.
OPERATION Weight transmitter with 4 set-point free settable on full range, 4 output potential free relay contacts (115Vac/30Vdc, 0.5 A). For weights superiour or equal to the values of the set-points the related contacts will be closed. The opening of the contacts for decreasing weight will be executed by considering the histeresys values programmed in the constants. The WT60 is equipped with 3 inputs to perform the follow following ing functions: functions: - Weight zero-setting - Print - Gross / Net weight visualization or Peak function
CALIBRATION: Instrument calibration can be performed by setting the full scale of the instrument and the sensitivity of load cells (THEORETICAL CALIBRATION) or by means of a SAMPLE WEIGHT. SERIAL SERIAL PORTS PORTS:: The instr in strument ument is i s equipped equipp ed with wi th a RS232 RS232 serial seri al port (COM 1) and a RS422/485 serial port (COM 2). Ac According ing to serial ial ports settin tting g, executab table via keyboard, the the foll follo owing ing connectio tions can be performed: 24 column printer : weight value (gross / net / peak), date, time and instrument identification number can be printed out via keyboard or external contact. - remote display for weight transmission. - PC / PLC : Communication Protocol for PC, ModBus, ProfiBus (only with converter model Modprofi). -
ANALOG OUTPUT (16 bit) : the full scale of the output can be set from the keyboard between 10% and 100% of the instrument’s full scale (16 bit - 65536 div.).
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TECHNICAL CHARACTERISTICS Power Supply Power consumption Insulation Humidity (condensate free) Operating Temperature StorageTemperature
230 / 115 Vac 50/60 Hz 10 VA Class II 85 % -10°C ÷ +50°C -20°C ÷ +70°C
Display Led Keyboard
5-digit numeric – 7 segment led (h 20 mm) 8 Led ( 3 mm) 5 Keys
Standard version : Dimensions Drilling template Depth Monting Material of housing Front Panel Protection IP67 box version : Dimensions Monting Front Panel Protection
144 mmx 72 mmx 120 mm(depth) 139 mm x 67 mm 170 mm (terminals boards included) Panel Noryl (UL 94 V1) IP54
180 x 180 x 100 mm. Four fixing holes Ø 4 mm (centre distance 163 x 163 mm). Wall IP67
Load cells Supply Linearity Temperature drift A/D Converter Internal divisions (display) Measure range Digital Filter / Conversion rate Decimals / Display increments
5 Vdc / 120mA (max 8 cells in parallel – 350 ohm) < 0.01% Full Scale < 0.0003% Full Scale / °C 24 bit +/- 99.999 min: - 2 mV to + 2mV ; max – 19.5 mV to + 19.5 mV from 0.2 to 25 Hz ; 5 – 10 – 25 – 50 readings/sec. 0 - 4 decimals ; x 1 x 2 x 5 x 10 x 20 x 50 x 100
Logic Outputs Logic Inputs
N° 4 relays (NO contacts) max 115Vac/30Vdc, 0.5 A cad. N° 3 optoisolated 12Vdc/24Vdc PNP
Serial Ports (n° 2)
COM1: Rs232c half duplex COM2: Rs422/Rs485 half duplex. 5m (Rs232) ; 500m (Rs422 and Rs485) ASCII; Modbus ; Profibus (only with converter model Modprofi) 1200, 2400, 4800, 9600, 14400, 19200, 28000, 38400, 57600 selectable
Max cable lenght Serial Protocols Baud rate ANALOG OUTPUT Resolution Calibration Impedances Linearity Temperature drift
Voltage: 0 ÷ 10 V / 0 ÷ 5 V ; Current: 0 ÷ 20 mA / 4 ÷ 20 mA 16 bits from keyboard Voltage: min. 10 Kohm Current: max. 300 ohm < 0.03% Full Scale < 0.001% Full Scale / °C
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ELECTRICAL CONNECTIONS Warning: the following procedures must be executed by skilled workers. All the connections must be executed while the instrument is sw itched off. Connect the load cells by means a terminal board in a water-proof junction box, by connecting the leads having the same colour; perform the same operation for the shield. By means of a shielded cable with a section not lower than 0,2 mmq connect the terminal board to the WT60. The routing shall be far away from the power cables and possibly protected by a metal pipe.
WT60 COM (1 / 2) COM CONNECTOR (1 / 2):
1 2 3 4 5 6 7 8 9 10 11 12 13 1415 1617
CONNECT THE SHIELD TO THE GROUND
E E S S S S A A I G I N N X X E E G C C N N N N A A I T I T S S A A L L A A E E L L O O Z T T + - - + G G E R . .+ O O O U U T T P P U U T T 6-WIRE - +
CONNECTION LOAD CELLS
OAD CELL S: 4-WIRE CONNECTION
S S S S C E E E E O T T T T M 1 2 3 4 M P N C O R E O N I T M N O M T G U R U T O N P S I U S N T P S / U P T E S A K
1 2 3 4 5 6 7 E E X X C C I T T I A A T T . . - +
S S I G I G N N A A L L - +
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L N
230 Vca
1.SHIELD 2.( RX ) RS232 - COM 1 3.( TX ) RS232 - COM 1 4.( TX + ) RS422 - COM 2 5.GND - COM 1 6.( TX - ) RS422 - COM 2 7.( RX - ) RS422 - COM 2 8.( CTS ) RS232 - COM 1 9.( RX + ) RS422 - COM 2
WARNING: The RX - of the RS422 output is connected at PIN 7, while in WT30000-series in struments it was connected at PIN 1.
IP67 BOX VERSION
CONNECTOR COM 1 / 2 1 2 3 4 5 6 7 8 9
1.SHIELD 2.( RX ) RS232 - COM 1 3.( TX ) RS232 - COM 1 4.( TX + ) RS422 - COM 2 5.GND - COM 1 6.( TX - ) RS422 - COM 2 7.( RX - ) RS422 - COM 2 8.( CTS ) RS232 - COM 1 9.( RX + ) RS422 - COM 2
COM
WARNING: The RX - of the RS422 outp ut is conn ected at PIN 7, whi le in WT30000-series inst rum ents it w as conn ected at PIN 1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1617
4-WIRE CONNECTION LOAD CELLS 1 2 3 4 5 6 7 E E X X C C I T T I A A T T . . - +
S S I G I G N N A A L L - +
CONNECT THE SHIELD TO THE GROUND
E E S S S S A A I G I N N X X E E G C C N N N N A A I T I T S S A A L L A A E E L L O O Z T T + - - + G G E R . .+ O O O U U T T P P U U T T - +
6-WIRE CONNECTION LOAD CELLS
S S S S C E E E E O T T T T M 1 2 3 4 M P N C O R E O N I M N T - M O T G U R U T N O P S I U N S P T S / U P T E S A K
L N
230 Vac
CHANGING VOLTAGE Remove the board and connect together the welding points market in the diagram using a stiff wire (on welding side, located under the transformer ).
230 Vca . V 0 3 2 0 1 P J
JP11
115 V.
115 Vca . V 5 1 1 1 1 P J
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. V 0 3 2 0 1 P J
JP11
115 V.
. V 5 1 1 1 1 P J
STARTING UP THE INSTRUMENT Turn on the instrument. Supply the instrument, wait for about 5 minutes so that all components reach a steady temperature. Make sure that the displayed weight is positive and that increases if one subjects the container to a force weight. In case the instrument displays a negative value or " no Conn ", ”SEGn InF” , “noSEGn” messages, check the load cells connection and the correct load cells installation (loading direction). Check the correct mechanical installation of the container ( the position of tubes, mounting accessories, etc. ).
TARE ZERO-SETTING ) ( ONLY FOR INSTRUMENT ALREADY CALIBRATED IN LABORATORY Make sure that the container is empty, during the weight displaying phase press the CONST key and the “ConSt” message will appear for 2 seconds, while this message is displayed press , the message “CAL.tE.” will appear. Press , the “CALIb” message will appear, press ENTER and the display will show “CAL” alternating with the weight reading. Press ZERO to set the tare to zero. To exit, after setting the tare to zero, press ESC for two times to return to the weight displaying phase. After the tare zero-setting, the tare value will be memorized in the “ ZEro” parameter (submenu “CAL.tE.”), take note the value (see page 6). In case of tamperings or instrument replacement, if it is not possible to unload the product to repeat the operation, you can write the memorized “ZEro” value in the “tArA” parameter (submenu “CAL.tE.” ).
ALARM: In case the instrument shows the “ ¯ ¯ ¯ ¯ ¯ ¯ ” message, it indicates that the weight is higher than the value programmed in the “CAPAC” parameter.
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INSTRUMENT CALIBRATED IN LABORATORY
In this case the instrument is supplied pre-calibrated; proceed with a calibration check. Set values : “C APAC” ( ); “SEnSI.” ( ); “dIVIS” (
)
INSTRUMENT CALIBRATION CHECK: Ensure that the container is empty and that the instrument displays zero. Place a significant amount of products in the container (equal to at least 50% of the maximum quantity to be weighed) and ensure that the instrument indicates the correct value. - If there is a significant difference between the displayed value and effective amount ( greater than 1-2% ) check that this is not caused by a mechanical fault and check the electrical connections of the cell and the cell loading position. If the difference is not significant but around 1-2 % proceed with paragraph WEIGHT DISPLAY CORRECTION VIA KEYBOARD.
CORRECTING DISPLAYED WEIGHT FROM KEYBOARD If the instrument indicates a weight that is different from actual product weight inside the container, proceed in the following way: During the weight displaying phase press the CONST key, the " ConSt " message will appear, while this message is displayed press FORM, the following appears: “CAL.tE.”, press
, the following appears:
“CALIb” , press ENTER and the display will show “CAL” alternating with the weight reading, press and program the value of weight that is into the container by using and to increase / decrease the value, to change position (next digit). After setting the value and verifying its correctness, confirm pressing the ENTER key, the display will show “CALIb” alternating with the weight reading, then press ESC for two times to exit and return to the weight displaying phase. After the WEIGHT DISPLAY CORRECTION, the “PortA.” parameter will change, take note this value (submenu “CAL.tE.”). In case of tamperings or instrument replacement, if it is not possible to unload the product or using a sample weight to repeat the operation, you can write the memorized “PortA.” value in the “ CAPAC ” parameter (submenu “ CAL.tE.”).
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INSTRUMENT THAT HAS NOT YET BEEN CAL IBRATED
In this case the instrument has been supplied not calibrated; proceed with its CALIBRATION (THEORETICAL or SAMPLE WEIGHT), TARE ZERO-SETTING and CALIBRATION CHECK procedures.
CALIBRATION PARAMETERS ( submenu “ CAL.tE.” ) “CAPAC” ( kg , only whole numbers) : Full scale load cells , it is used for Theoretical Calibration togheter with “SEnSI.” and “dIVIS” parameters. “tArA” ( kg , only whole numbers) : Tare ; it is used for setting the tare value when it is not possible to unload the product to execute a TARE ZERO-SETTING. “SEnSI.” ( mV/V ) : Load cell sensitivity, it is used for Theoretical instrument Calibration togheter with “CAPAC” and “dIVIS” parameters. “dIVIS” (Divisions) : System’s resolution. ) only reading parameter ; capacity : only reading parameter; after “PortA.” ,( calibration (theoretical or with sample weight) this parameter shows the value memorized in the “CAPAC” parameter. It changes after a CORRECTING DISPLAYED WEIGHT VIA KEYBOARD. Take note this value. In case of tamperings or instrument replacement, if it is not possible to unload the product or using a sample weight to repeat the THEORETICAL CALIBRATION, you can write the memorized “ PortA. ” value in the “ CAPAC ” parameter. ) only reading parameter ; after the tare zero-setting, the tare value will be “ZEro” ,( memorized in this parameter. Take note the value; in case of tamperings or instrument replacement, if it is not possible to unload the product to reset the tare, you can write the memorized “ ZEro ” value in the “ tArA ” parameter .
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THEORETICAL INSTRUMENT CALIBRATION The entry of “CAPAC“ , “SEnSI.” and “dIVIS” parameters, enables instrument calibration without the need for a sample weight. Obviously the calibration settings should be tested with a known quantity of product. During the weight visualization, press CONST, the "ConSt" message will appear, while this message is displayed press the key, “CAL.tE.” message appears, then press ENTER the following appears: “CAPAC”, press ENTER then set the full scale for the load cells in integral values without decimals. Example: if there a three load cells with a rated capacity of 300 kg , and the required resolution is 0.1 kg, set this parameter to 900. Confirm with ENTER , then press “tArA”, press
, the following will appear:
and the following will appear:
“SEnSI”, press ENTER and set load cell sensitivity expressed in mV with 4 decimal points. For load cells with sensitivity 2mV/V, set 2.0000 (for example: for 3 load cell with sensitivity 1.9800mV, 1.9600mV, 1.9900mV, set 1.9766mV). Confirm with ENTER , then press , the following will appear: “dIVIS”, (resolution: from 0.0001 to 100). Press and then set system resolution from the options available. Each time resolution is modified the zero-setting and full scale in the memory are calculated automatically. Resolutions that are incompatible with calibration parameters or settings in the memory are not accepted. Press ENTER to confirm, then press ESC for two times to return to the weight display.
On completion of THEORETICAL CALIBRATION proceed as follows : -
RESET THE TARE( see paragraph TARE ZERO-SETTING).
-
CHECK CALIBRATION(see paragraph INSTRUMENT CALIBRATION CHECK).
-
if necessary CORRECT WEIGHT VIA KEYBOARD (see paragraph WEIGHT DISPLAY CORRECTION VIA KEYBOARD).
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CALIBRATION WITH SAMPLE WEIGHT PROCEED TO CALIBRATION WITH SAMPLE WEIGHT ONLY IF YOU DO NOT KNOW THE FULL SCALE AND SENSITIVITY OF LOAD CELLS, or WITH LEVER RATIO SYSTEMS.
Press CONST , the " Const " message appears, while this message is displayed press the “ CAL.tE.” message appears, press ENTER, the following appears:
key,
" CAPAC ", press ENTER and set the value “000000”, confirm with ENTER. Then press until the “dIVIS” message appears, press ENTER and set the resolution. Confirm with ENTER and the “dIVIS” message appears again. Press ESC and the “CAL.tE.” message appears, then press , the following appears : “CALIb” , press ENTER , the message “CAL” alternated with the weight returns on display. Press ZERO to zero-set the system tare, place a significant amount of products in the container (equal to at least 50% of the maximum quantity to be weighed) checking on display that increase is proportional to the loaded weights, in order to ensure that no mechanic friction is present. Press and enter the sample weight value by using keys and to increase or decrease the value and to move to the next digit. After setting the value and checking that no other factors affect the container, press ENTER to confirm and the “CALIb ” message, alternated with the weight, returns on display. Press ESC for two times to return to the weight displaying.
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SET POINT and HYSTERESIS PROGRAMMING During weight display, press FORM , to display:
“SEt
l” (set-point value 1) press ENTER and program set point value 1 by using keys to increase or decrease the value and to move to the next digit.. Press ENTER to confirm, followed by to display:
and
“SEt 2” (set-point value 2) press ENTER and program set point value 2. Press ENTER to confirm, followed by
to display:
“SEt 3” (set-point value 3) press ENTER and program set point value 3. Press ENTER to confirm, followed by
to display:
“SEt 4” (set-point value 4) press ENTER and program set point value 4. Confirm with ENTER , then press ESC to display :
“IStE. 1” (hysteresis for set-point 1) press ENTER and program the hysteresis for set-point 1, by using keys and to increase or decrease the value and to move to the next digit. The condition of the set-point relay will change for decreasing weight when the weight will be equal to the programmed set-point value minus the one programmed in this constant. Press ENTER to confirm, followed by
to display:
“IStE. 2” (hysteresis for set-point 2) press ENTER and program the hysteresis for set-point 2. Press ENTER to confirm, followed by
to display:
“IStE. 3” (hysteresis for set-point 3) press ENTER and program the hysteresis for set-point 3. Press ENTER to confirm, followed by
to display:
“IStE. 4” (hysteresis for set-point 4) press ENTER and program the hysteresis for set-point 4. Press ENTER to confirm, followed by ESC to return to the weight display.
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WEIGHT ZERO-SETTING FOR LITTLE CHANGES The instrument enables the reset function only if the quantity displayed is lower than the value set in the constant “0 SEt”. If an attempt to reset a higher value is made, the message “ t ¯ ¯ ¯ ¯ ” is displayed and reset is not performed.
Zero-setting via keyboard: Press ZERO during the weight display and the instrument displays the message “StorE” for 3 seconds. To reset the weight, press ENTER to confirm while the message remains on display.
Zero-setting via contact: Close the ZERO contact briefly (approx. 0.5 seconds) to reset the weight .
NET / GROSS FUNCTION (MANUAL BATCHING) - Press DOSA key or close the NET/GROSS external button to set to zero the instrument and allow to the operator to load additional quantities of product (the letter “n ” will appear on the left hand side of the display). This operation may be carried out several times by the operator according to need. - Hold down DOSA or close the NET/GROSS button for about 3 seconds to return to the gross weight.
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ACCESS PASSWORD ( 6935 ) It is possible to access to the programming and calibration functions by using a password.
ENABLE THE PASSWORD: Press CONST, the "ConSt" message will appear, while this message is displayed press the key, “0000” will appear , enter “ 6935 ” (password), by using keys and to increase or decrease the value and to move to the next digit. Then confirm with ENTER, “oFF” will appear. Press and enter the numbers corresponding to the following functions (the operator will be able to access to the following functions only by means of the password):
1 = “ CAL.tE.” ; “CALlb” parameters ( Theoretical Calibration, Tare zero setting, Weight correction, Calibration with sample weight). 2 = Set-up Menu (“tESt ” excluded). 3 = Set-Point and Istheresys programming. For example: If you want to enable password for Calibration and serial ports confguration, enter “000014”. Then confirm with ENTER to exit and return to the weight display.
DISABLE THE PASSWORD: Press CONST, the "ConSt" message will appear, while this message is displayed press the key, “0000” will appears. Enter “ 6935 ” by using keys and to increase or decrease the value and to move to the next digit; then confirm with ENTER. Enter “00000”, then press ENTER again to disable the password and return to the weight display.
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KEY FUNCTIONS WITHIN MAIN MENU AND SUBMENUS To access the main menu press CONST, the "Const" message will appear, while this message is displayed press the key. - set to zero the displayed value during the parameter programming. - exit from submenu item and return to previous item; exit main menu - move to the next digit during the parameter programing - move to next menu item - increase the value of selected parameter - move to previous menu item - decrease value of selected parameter - enter selected menu item - confirm values entered in parameters
LED FUNCTIONS: L1 : Status of ZERO input; illuminates when the ZERO input contact is closed. L2 : Status of PRINT input; illuminates when the PRINT input contact is closed. L3 : Status of NET/GROSS input; illuminates when the NET/GROSS input contact is closed. L4 : Status of PEAK input; illuminates when the PEAK input contact is closed. L5 : Status of set-point1 output; illuminates when the set-point1 output is closed. L6 : Status of set-point1 output; illuminates when the set-point2 output is closed. L7 : Status of set-point1 output; illuminates when the set-point3 output is closed. L8 : Status of set-point1 output; illuminates when the set-point4 output is closed.
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OVERVIEW OF SET-UP MENU To access the main menu press CONST, the " ConSt " message will appear, while this message is displayed press the key : Display
Functions
“ CAL.tE.” THEORETICAL INSTRUMENT CALIBRATION (see page 7 )
“CALIb”
TARE ZERO-SETTING (see page 4 ) WEIGHT DISPLAY CORRECTION VIA KEYBOARD (see page 5) “ CALIBRATION WITH SAMPLE WEIGHT (see page 8)
“PArAM”
Programming of weighing parameters: filter, autozero, threshold for zero-setting, auto zero-tracking (see pages 16, 17)
“oUt”
Set-point and input operating mode (see pages 17, 18).
“tESt”
Input / Output Test. Cell response signal expressed in mV. Internal points (see pages 18, 19)
“SeriA.”
Serial output configuration (see pages 19, 20)
“AnA”
ANALOGUE OUTPUT configuration and calibration (see pages 21, 22).
Submenu “ PArAM”: Display “FILtE.”
“Md.FLt.”
Functions Weight filter parameter (from 0 to 9). 0 = most rapid response, 9 = maximum filter.
( Standard 5 )
Weight acquisition frequency ( selectable from A to F) ( Standard = A )
“AUt. 0”
Autozero threshold on activation, expressed as a weight value (0 = disabled)
“0 – SEt”
Threshold for zero-setting for small variations.
“t. InS. 0”
Zero-tracking time ( 0,1 to 5.0 seconds )
“r. InS. 0”
Zero-tracking divisions ( 1 to 99 divisions )
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Submenu “ oUt”: Display
Functions Operating mode for OUTPUTS 1, 2, 3, 4 :
“SEt “SEt “SEt “SEt
l” 2” 3” 4”
Condition in which set-point 1 is activated. “nEt” ; “GroSS” ; “PEAK” Output 1 normally open or normally closed. “n.A.” ( open ) “n.C.” ( closed )
( Standard “GroSS” ) ( Standard “n.A.” )
Activation of output 1. “PoSIt.” (for positive weights) ; “nEGAt.” (for positive or negative weights) “PoS. 0” (for positive weights, 0 included) ( Standard NET-GROSS function ) Operating mode for NET-GROSS/PEAK INPUT (input n. 3) :
“InG. 3”
“nEt”. By closing the logic input n. 3, the weight will be set to zero, when L3 Led will light up, this operation can be repeated several times.. By keeping closed the logic input n. 3, the gross weight will appear and the L3 Led will light off. “PEAK”. Permanent closure of logic input 1 enables the PEAK function and illuminates the relative L4 led. Input opening deactivates the function.
Submenu “ tESt” : Display
Functions
“t - In”
Logic input test
“t - oUt”
Logic output test.
“M.VoLt”
Load cell response signal expressed in mV
“P – dIV.”
Internal points for single division.
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Submenu “ SeriA.” : Display
Functions
“bAU. C1”
COM1-RS232 Baud rate, options available: 1200, 2400, 4800, 9600, 14400, 19200, 28000, 38400, 57600
“PEr. C1”
COM1 ( RS232 ) connections: “232 oF” (RS232 disabled ) “232 PC” (PC or PLC – Communication Protocol) “232 rI” (remote display) “232 “rC” (HDRIP575C or HDRIP5125C remote displays) “232 Mo” (serial communication by means ModBus protocol ) “232 St” (printer) “bCdCA” ( function disabled) “bCdEF” ( function disabled)
“bAU. C2”
COM2-RS422/485 Baud rate, options available: 1200, 2400, 4800, 9600, 14400, 19200, 28000, 38400, 57600
“Addr.”
COM2 ( RS422/485 ) connections: “422 oF” (RS422/485 disabled ) “422 PC” (PC or PLC – Communication Protocol) “422 rI” (remote display) “422 “rC” (HDRIP575C or HDRIP5125C remote displays) “422 Mo” (serial communication by means ModBus protocol ) “422 Pr” (serial communication by means ProfiBus protocol – only with ModProfi converter) Serial address or machine identification address (from 1 to 99)
“Un. - St.”
Unit of measure for PRINT ( Kg, Gr, t )
“A - CAr.”
number of lines blank from a printout to another (from 0 to 9)
“Ind.Pr”
Serial address fro Profibus Protocol.
“PEr. C2”
Submenu “ AnA” (ANALOG OUTPUT): Display
Funzioni
“F.SC.An”
(analogue output full scale) . Weight corresponding to the Full Scale of the analogue output. Default : value set in the “CAPAC” parameter.
“Mod.An”
Value at which analogue output association is required “nEtto” (net weight) “Lordo” (gross weight)
“rAnGE”
Analog output range : “0-20MA” ( 0-20mA); “4-20MA” (4-20mA); “0-5V” ; “5 –5 V”; “0-10V” ; “10 - 10V”
“SEL.An”
operating analogue output
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“oFF.An”
Adjustment zero offset and Full Scale. “-SEt. 0 -” ( zero) “–SEt. FS -” (full scale)
“tESt”
Analogue output operation Test
SET-UP MENU To exit and return to the previous menu press ESC. To access the main menu press CONST, the " ConSt " message will appear, while this message is displayed press the key :
CAL.tE. This section enables Theoretical instrument calibration (see page 6).
CALIb This section enables system tare reset, new calibration with a sample weight, or correction of the display if the instrument displays a value other than the actual weight in the container (see page 4, 5 and 8).
PArAM Use
and
to pass from a parameter to another.
ENTER to enter parameter. During the parameters’ programming use: move to the next digit. and to increase/decrease a value. ENTER to confirm the value programmed.
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“FILtE.”
(Filter to reduce weight oscillations). The higher the value is, the slower is the weight change. The change of the Filter parameter determines the display update frequency (see table below) and then the analog output, relays outputs and the serial communication.
“ Md.FLt.”
FILTER 0 1 2 3 4 5 6 7 8 9
(weight acquisition frequency). It is also possible to change the weight acquisition frequency of the “ AD7730” converter, the instrument has six different calculation methods ( A , B , C , D , E , F ). By selecting MODE A ( default ) the acquisition frequency is 57 Hz. By selecting from MODE B to F the acquisition frequency changes according to the “Filter” parameter (see table below). DISPLAY UPDATE FREQUENCY ( Hz ) 50 50 25 25 25 10 10 10 5 5
MODE FILTER
FILTER
WEIGHT ACQUISITION FREQUENCY (HZ)
1 = MODO A
0 to 9
57
0;1;2 3 to 9 0;1 2 to 9 0;1 2 to 9 0 1 to 9 0 1 to 9
57 114 57 171 57 228 57 285 57 342
2 = MODO b 3 = MODO C 4 = MODO d 5 = MODO E 6 = MODO F
“Aut. 0”
( autozero threshold). On activation of the instrument, if the weight displayed is lower that the set value in this section, the value is reset.
“0 - SEt”
(reset threshold for small variations) . During weight display press ZERO or close the reset input to reset the display, only if the quantity displayed is lower than the value set in this constant.
“t. InS. 0”
(zero-tracking time). To enable the zero-tracking time set from 0.1 to 5.0 seconds. When the balance is empty, the zero-tracking device maintains the zero indication within certain limits automatically; it compensates for slow variations of weight. To active the zero-tracking set “t InS 0” and “ r InS 0” parameters. The zero-tracking runs when the weight is different from the zero for a value equal or lower than divisions set in the “r InS 0” parameter, for a time higher than that set in the “t InS 0” parameter. To deactive this function set at least one of two parameters to zero.
“r. InS. 0”
(zero-tracking divisions). To enable the zero-tracking time set from 1 to 99.
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oUt This section enables setting of the input operating mode and condition for activation of the logic output in relation to the programmed set-point. Programming is independent for each of the 4 logic outputs.
Use and to pass from a parameter to another. ENTER to enter parameter.
“SEt 1”
(SET-POINT 1 operating mode) “nEt”
SET-POINT 1 is activated according the net weight value.
“GroSS”
SET-POINT 1 is activated according to the gross weight value.
“PEAK”
SET-POINT 1 is activated according the peak value.
Press ENTER to confirm, the following will appear:
“n.A.”
(normally open) output n 1 is activated when the weight is equal to or greater than the value set in SET-POINT 1.
“n.C.”
(normally closed) output n 1 is activated when the weight is lower than the value set in SET-POINT 1.
Press ENTER to confirm, the following will appear:
“PoSIt.”
output 1 is activated for positive weights only.
“nEGAt.” output 1 is activated for positive and negative weights. “PoS. 0”
output 1 is activated for positive weights, 0 included (if SET 1 = 0 is programmed) .
To program SEt 2 , SEt 3 and SEt 4 proceed to the following way:
“InG. 3”
(Operating mode for NET-GROSS/PEAK INPUT - input n. 3)
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“nEt”
By closing the logic input n. 3, the weight will be set to zero, when L3 Led will light up, this operation can be repeated several times. By keeping closed the logic input n. 3, the gross weight will appear and the L3 Led will light off.
“PEAK”
Permanent closure of logic input n. 3 enables the PEAK function and illuminates the L4 led. Input opening deactivates the function.
tESt Use
and
to pass from a parameter to another.
ENTER to enter parameter. “t - In”
(Logic Inputs Test). The status of inputs can be checked by ensuring the changeover from 0 to 1 for the inpu1 when the relative input changes from open to closed; from 0 to 2 for the input 2; from 0 to 3 for the input 3 the relative input changes from open to closed. The zero on the left represents input 1, and the one on the right represents input 3.
“t - oUt”
(Logic Outputs Test). This enables a check on operation of the four outputs. The instrument shows “ 0000 ”, the zero on the left represents input 1, and the one on the right represents output 4.
Press press
“M.VoLt”
to close the selected output, press again to re-open the output.
to move to the following output;
(load cell response signal expressed in mV) Value with three decimal points. Note: At maximum load, this parameter must not exceed the following values: - cell sensitivity 1 mV/V ---> max set value 5 mV. - cell sensitivity 2 mV/V ---> max set value 10 mV. - cell sensitivity 3 mV/V ---> max set value 15 mV.
“P – dIV.”
(Internal points for single division). Internal points used for each single division displayed.
SErIA. The instrument is equipped with a RS232 serial port (COM 1) and a RS422/RS485 port (COM 2).
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For all protocols, communication parameters are fixed at 8 data bits,1 stop bit and no parity. Use
and
to pass from a parameter to another.
ENTER to enter parameter. During the parameters’ programming use: move to the next digit. and to increase/decrease a value. ENTER to confirm the value programmed.
“bAU. C1”
( baud rate COM 1- RS232 ). Select the desired baud rate: 1200, 2400, 4800, 9600, 14400, 19200, 28000, 38400, 57600. For PRINTER connection set Baud-rate for COM 1 = 9600.
“PEr. C1”
( COM 1 connections - RS232 ). “232oF” RS232 disabled. “232PC”
Bidirectional Protocol, the instrument responds to the request received from the serial line. Data exchange only occurs if the address set from PC corresponds to that of the instrument.
“232rI”
continuous transmission. Protocol for connection to remote display.
“232rC”
Protocol for connection to HDRIP575C / HDRIP5125C remote displays.
“232Mo” Communication Protocol ModBus RTU . “232St”
Protocol for connection to a 24-column printer.
“bCdCa” function disabled “bCdEF” function disabled “bAU. C2”
( baud rate COM 2- RS422-485 ). Select the desired baud rate: 1200, 2400, 4800, 9600, 14400, 19200, 28000, 38400, 57600.
“PEr. C2”
(COM 2 connections - RS422-485) “422oF”
RS422-485 disabled
“422PC” Bidirectional Protocol, the instrument responds to the request received from the serial line. Data exchange only occurs if the address set from PC corresponds to that of the instrument. This protocol supports the RS422-485 serial communication system designed for connection of several instruments to a master unit.
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“422rI”
continuous transmission. Protocol for connection to remote display.
“232rC”
Protocol for connection to HDRIP575C / HDRIP5125C remote displays.
“232Mo” Communication Protocol ModBus RT . “422Pr”
Profibus Protocol (only with converter model Modprofi).
“Addr.”
(instrument address). A value from 1 to 99 can be set.
“Un. - St.”
(unit of measure for print ), selectable: Kg , Gr , t .
“ A - CAr.”
(number of lines blank from a printout to another) A value from 0 to 9 can be set.
“Ind.Pr”
Serial address for Profibus protocol. Set a value from 1 to 126.
AnA ANALOG OUTPUT Use
and
to pass from a parameter to another.
ENTER to enter parameter. During the parameters’ programming use: move to the next digit. and to increase/decrease a value. ENTER to confirm the value programmed.
“F.SC.An”
(analogue output full scale) . Weight value at which analogue output at 20mA or 10 Vdc or 5Vdc is required.
“Mod.An”
(analogue output association). Value at which analogue output association is required.
“rAnGE”
“nEtto”
analogue output transmits the net weight value.
“Lordo”
the analogue output transmits the gross weight value.
(output range selection).
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“0-20MA” 0-20 mA analog output (jumper E1 in B position). “4-20MA” 4-20 mA analog output (jumper E1 in B position). “0 – 5 V” 0-5 Vdc analog output. (jumper E1 in A position). “5 – 5 V” + / - 5 Vdc analog output (jumper E1 in A position A , close JP3 ). “0-10V”
0-10 Vdc analog output. (jumper E1 in A position).
“10 - 10V” + / -10 Vdc analog output. (jumper E1 in A position , close JP3 ). To set jumpers E1 and JP3 see the drawing at page 22.
“SEL.An”
“oFF.An”
(operating analogue output) “dIVIS”
to link the analog output to the displayed divisions (STANDARD).
“PUntI”
to link the analog output to the internal points of the converter (16 bit 65536 div.).
(analogue output setting). You must set the zero value and full scale when the “rAnGE”parameter has been modified.
“- SEt.0 -” ( zero ) Use a digital tester and keys and exactly at zero ( 0Vdc, 0mA, 4mA ).
to adust the analogue output
“SEt.FS-” ( fondo scala ). Adjust the Full Scale of analog output ( 5Vdc, 10Vdc, 20mA ) by using and . “tESt”
(analog output Test). Analogue output operation can be checked by setting a full scale value as a percentage; the output takes on the value shown on the display. The analog output can be varied from 10% to 100% of the full scale.
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ANALOG OUTPUT See the “ rAnGE ” at page 21. According to “rAnGE” parameter setting (submenu “AnA”), preceed to the following way:
0-20MA ; 0-20 mA analog output (jumper E1 in B position). - 4-20MA ; 4-20 mA analog output (jumper E1 in B position). - 0 – 5 V ; 0-5 Vdc analog output. (jumper E1 in A position). -
5 – 5 V ; + / - 5 Vdc analog output (jumper E1 in A position A , close JP3 ). - 0-10V ; 0-10 Vdc analog output. (jumper E1 in A position). - 10 - 10V ; + / -10 Vdc analog output. (jumper E1 in A position , close JP3 ). -
3 P J
JP3 CLOSE IT TO OBTAIN +/- 5 VDc or +/- 10 Vdc ANALOG OUTPUT E1 A
B E1
A
B
JUMPER E1
A
B TERMINAL BOARD
CURRENT OUTPUT VOLTAGE OUTPUT
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ALARMS “no.Con” : It appears when any load cells is connected, or when a excitation core is not connected. “ SEGn InF” : The load cell signal is lower than -20 mV. “no-SEGn”: It appears when a signal core is not connected or the signal is higher than 20 mV. “AdC-Er” : error on AD7730 converter. “⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ” : it indicates that the weight is higher than the value programmed in the “CAPAC” parameter.
“ _ _ _ _ _ _ _ _ _” : it indicates that the weight is lower than –9999. “no.CAL”: It appears, alternated to the weight, if no calibration has been executed (CAPAC = 0 ); the instrument disables the serial communication.
- 25 -
PRINT For PRINTER connection set Baud-rate for COM 1 = 9600.
Weight printout: From the weight visualization close the PRINT contact . WT60000 1 dat a st ampa 10- 06- 04 or a st ampa 12: 15 PESO
LORDO
=
1077 Kg
If DOSA key has been pressed or NET input has been closed, the following will appear: WT60000 1 dat a st ampa 10- 06- 04 or a st ampa 12: 15 PESO NETTO = PESO LORDO =
45 Kg 1077 Kg
If the PEAK input is closed, the following will appear: WT60000 1 dat a st ampa 10- 06- 98 or a st ampa 12: 15 PESO LORDO = PI CCO =
345 Kg 3309 kg
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SERIAL PROTOCOL Baud rate: 1200, 2400, 4800, 9600, 14400, 19200, 28000, 38400, 57600 ( selectable ) Data length: 8 Bit stop: 1 Parity: none It is possible to connect up to 32 instruments.
TO SELECT THE WEIGHT MONODIRECTIONAL TRANSMISSION SET THE PC CONNECTION IN THE “ SeriA.” MENU and ADDRESS (“ Addr. ” ) = 0 TO SELECT THE WEIGHT BIDIRECTIONAL TRANSMISSION SET THE PC CONNECTION IN THE “ SeriA.” MENU and ADDRESS (“ Addr. ” ) = from 1 to 99
MONODIRECTIONAL TRANSMISSION OF THE WEIGHT Used lines = TX , GROUND Program the instrument number ( address ) = 0 Readings per second: Baud rate 9600 / 5700 , 5 readings/sec. The WT will transmit the following ASCII string: & N x x x x x x L y y y y y y \ ck ck CR
in which : & = 1 character of string beginning ( 38 ASCII ) N = 1 c. of net weight identification ( 78 ASCII ) x x x x x x = 6 c. of net weight or Peak value (if present)( 48 ÷ 57 ASCII ) L = 1 c. of gross weight identification ( 76 ASCII ) y y y y y y = 6 c. of gross weight ( 48 ÷ 57 ASCII ) \ = 1 c. of separation ( 92 ASCII ) ck ck = 2 ASCII checksum characters calculated considering the characters between & and \ excluded. The checksum value is obtained from the calculation of XOR (or exclusive) of the 8-bit ASCII codes of the characters considered. This obtains a character expressed in hexadecimals with two digits that can have the values from “0” to “9” and from ”A” to “F”. CR = 1 c. of string end ( 13 ASCII ) The weight data can contain possible fixed zeroes. The first character of net / gross weight can get the value “ – ” (ASCII 45) in case of negative weight.
- 27 -
BIDIRECTIONAL TRANSMISSION BETWEEN WT60 AND PC It is possible to connect up to 32 instruments. The PC always starts the communication, the instrument WT is enabled to data interconnection only if the PC’s address corresponds to the instrument address. Readings per second:: Baud rate 9600 , 30 readings/sec. Baud rate 57600 , 160 readings/sec. After reception, the WT waits from 0 to 15 ms before sending a reply.
1) SETTING SET-POINTS FROM PC: Warning: If in the “ dIVIS “ parameter has been programmed a value different from 1 / 0,1 / 0,01 / 0,001 and the set-point value that you want to programme is not multiple of “ dIVIS “ value, the instrument will round to the nearest whole number below. For example: if “ dIVIS “ = 2 and you programme 101, the instrument will round to 100. The PC transmits the following ASCII string containing the set-point to be set on the WT: $ a a x x x x x x y ck ck CR
in which : $ = 1 character of string beginning ( 36 ASCII ) a a = 2 c. of address ( instrument number ) x x x x x x = 6 c. of setpoints ( 48 ÷ 57 ) y = 1 c. of setpoint’s number ( see * ) ck ck = 2 c. of check-sum CR = 1 c. of string end ( 13 ASCII ) * ) y = A ( setpoint 1 ) = B ( setpoint 2 ) = C ( setpoint 3 ) = D ( setpoint 4 ) In the case of correct reception the WT replies with the following string: & & a a ! \ ck ck CR
in which: & & = 2 characters of string beginning ( 38 ASCII ) a a = 2 c. of address ( instrument number ) ! = 1 c. of OK reception ( 33 ASCII ) \ = 1 c. of separation ( 92 ASCII ) ck ck = 2 c. of check-sum CR = 1 c. of string end ( 13 ASCII )
- 28 -
while in the case of incorrect reception it replies with the following string: & & a a ? \ ck ck CR
in which : & & = 2 characters of string beginning ( 38 ASCII ) a a = 2 c. of address ( instrument number ) ? = 1 c. of reception error ( 63 ASCII ) \ = 1 c. of separation ( 92 ASCII ) ck ck = 2 c. of check-sum CR = 1 c. of string end ( 13 ASCII )
2) READING WEIGHT, SET-POINT AND PEAK (IF PRESENT) FROM PC: The PC transmits the following ASCII string containing the item of data to be read: $ a a j ck ck CR
in which : $ = 1 character of string beginning ( 36 ASCII ) a a = 2 c. of address ( instrument number ) j = 1 c. of setpoint’s number ( see * ) ck ck = 2 c. of check-sum CR = 1 c. of string end ( 13 ASCII ) * ) j = a ( setpoint 1 ) = b ( setpoint 2 ) = c ( setpoint 3 ) = d ( setpoint 4 ) = p ( peak ) = t ( gross weight ) = n ( net weight ) The first character of net / gross weight can get the value “ – ” (ASCII 45) in case of negative weight. In the case of correct reception the WT replies with the following string: & a a x x x x x x j \ ck ck CR
while in the case of incorrect reception it replies with the following string: & & a a ? \ ck ck CR
while in the event of a peak request, with no peak configured, it responds with: & a a # CR
- 29 -
Error messages: In case of weight present in the container is higher than maximum capacity “CAPAC”, the alarm message “ ¯ ¯ ¯ ¯ ¯ ” will be displayed. The instrument will transmit the following string: & a a s s O-L s t \ ck ck
In case of wrong load cells connection, the “ o-F ” message will be displayed. The instrument will transmit the following string: & a a s s O-F s t \ ck ck
in which : s = 1 c. of separation (32 ASCII – space-).
3 ) WEIGHT ZERO-SETTING FROM PC: The PC transmits the following ASCII string containing the zero-set command: $ a a Z E R O ck ck CR
In the case of correct reception the WT replies with the following string: & & a a ! \ ck ck CR
while in the case of incorrect reception it replies with the following string: & & a a ? \ ck ck CR
In the event of zero-setting higher than the maximum zero-settable value, it replies with the following string: & a a # CR
4 ) TOGGLING NET WEIGHT FROM PC: The PC transmits the following ASCII string containing the net toggle command: $ a a N E T ck ck CR
In the case of correct reception the WT replies with the following string: & & a a ! \ ck ck CR
- 30 -
while in case of a wrong reception it replies with the following string: & & a a ? \ ck ck CR
5) TOGGLING GROSS WEIGHT FROM PC: The PC transmits the following ASCII string containing the gross toggle command: $ a a G R O S S ck ck CR
In the case of correct reception the WT replies with the following string: & & a a ! \ ck ck CR
while in the case of incorrect reception it replies with the following string: & & a a ? \ ck ck CR
6 ) READING INPUTS STATUS: The PC transmits the following string ASCII containing the command of reading : $ a a I ck ck CR
in which : I = 1 c. of serial command identification ( 73 ASCII ) The WT in case of correct reception replies with the following string containing inputs status: & a a I k k k \ ck ck CR
in which : I = 1 c. of serial command identification ( 73 ASCII ) k k k = 3 characters of inputs status (“0” = OPEN ; “1” = CLOSED) the first character on the left refers to the input n. 1 (terminal 9), character n. 2 = input n. 2 (terminal 10), character n. 3 = input n. 3 (terminal 11) while in case of a wrong reception it replies with the following string: & & a a ? \ ck ck CR
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7 ) READING OUTPUT STATUS: The PC transmits the following string ASCII: $ a a W ck ck CR
in which : W = 1 c. of serial command identification ( 83 ASCII )
The WT in case of correct reception replies with the following string containing the outputs status: & a a W z z z z \ ck ck CR
in which : W = 1 c. of serial command identification ( ( 83 ASCII ) z z z z = 4 c. of outputs status ( “0” = OPEN ; 1 = CLOSED) the character on the left refers to status of output n. 1 (terminal 13) character n. 2 = input n. 2 (terminal 14) character n. 3 = input n. 3 (terminal 15) character n. 4 = input n. 4 (terminal 16) while in case of a wrong reception it replies with the following string: & & a a ? \ ck ck CR
8 ) FORCING OUTPUTS: The PC transmits the following ASCII string containing the command for forcing the status of outputs. To undo this command use the UNDO ‘FORCING OUTPUTS’ COMMAND (9) or swtich off the instrument. $ a a U o o o o ck ck CR
in which : U = 1 c. of serial command identification o o o o = 4 c. of outputs status ( “0” = OPEN ; 1 = CLOSED) the character on the left refers to status of output n. 1 The WT in case of correct reception replies with the following string: & & a a ! \ ck ck CR
while in case of a wrong reception it replies with the following string: & & a a ? \ ck ck CR
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9) UNDO ‘FORCING OUTPUTS’ COMMAND: The PC transmits the following ASCII string containing the command for undo the outputs forcing: $ a a o u t d e f a u l t ck ck CR
in which : o u t d e f a u l t = 10 c. of serial command identification ( 111, 117, 116, 100, 101, 102,
97, 117, 108,116 ASCII ) The WT in case of correct reception replies with the following string: & & a a ! \ ck ck CR
while in case of a wrong reception it replies with the following string: & & a a ? \ ck ck CR
CHECK-SUM CALCULATION The check-sum is composed of 2 ASCII characters ( ck ck ) obtained using this procedure : - Consider just UNDERLINED characters. - Calculate the OR ESCLUSIVO ( XOR ) of the codes of the ASCII characters : the XOR operation will give as results: 1 when the number of one of the factors is odd, otherwise the result is 0. character cod. ASCII decimal cod. ASCII exadecim. cod. ASCII binary 0
48
30
00110000
1
49
31
00110001
t
116
74
01110100
XOR =
117
75
01110101
- The result of XOR operation is composed of 2 exadecimal characters ( number from 0 to 9 or letter f rom A to F ). - The check sum is composed of 2 characters representing the result of the XOR operation (exadecimal notation - characters " 7 " and " 5 " ). Check sum calculated: $ 01
t 75
- 33 -
( requested weight address 1)
MODBUS PROTOCOL RTU
The MODBUS-RTU protocol enables reading and writing of registers present in LAUMAS instruments, based on the standard addressing system provided in the reference guide of Modicon PI-MBUS-300. Pay special attention to the values sent to the instrument: these must remain within the ranges specified in the tables on the following pages (and must guarantee correct instrument operation). Some data will be written directly into a special memory named EEprom, which can be written a limited number of times only (100,000). Therefore avoid writing continuously in these locations. If not otherwise specified, numerical values are expressed as decimal values in the following pages (in case of 0x prefix values are expressed as hexadecimal).
Parameters: - 1 start bit; - 8 data bits, least significant bit; - no parity, odd or even parity. - 2 stop bit in case of no parity (n-8-2) - 1 stop bit in case of checking parity (O-8-1, E-8-1)
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MODBUS – SUPPORTED FUNCTIONS In the MODBUS-RTU protocol USE ONLY this commands:
FUNCTION 03 (0x03) 16 (0x10)
DESCRIPTION READ HOLDING REGISTER PRESET MULTIPLE REGISTERS)
INSTRUMENT RESPONSE TIMES: To respond to most requests the instrument takes a maximum time of 20 mSec.(from 5 to 20 mSec.), with the exception of the following: Example with 19200bit/sec BAUD RATE: a) 8 bytes QUERY (88 bits) = 4,6 msec b) max delay for response = 20 msec c) 8 bytes RESPONSE (88 bits) = 4,6 msec d) time before the next query = 0,5 msec total = 30 mS (33 communications / second) In case of DELAY string the instrument waits for the time set before sending the response string to the PC. - To chage serial setting not use the same serial port but use the menu parameters. - Switch instrument off and switch on again it to save the settings. If you change the Delay time and the instrument address is not necessary switch off the instrument.
- 35 -
MODBUS RTU PROTOCOL for WT60000 BASE For more information see the reference guide of Modicon PI-MBUS-300. MODBUS RTU supported functions are only READ HOLDING REGISTER and PRESET MULTIPLE REGISTER. Maximum number of writing registers : 6.
R = READING register W = WRITING register LIST OF HOLDING REGISTERS Address 40001 40002 40003 40004 40005 40006 40007 40008 40009 40010 40011 40012 40013 40014 40015 40016 40017 40018 40019 40020 40021 40022 40023 40024 40030
Description Instrument Error Gross weight H Gross weight L Decimal point Status Register Net weight H Net weight L Decimal Point Peak H Peak L Decimal Point SetPoint 1 H SetPoint 1 L Decimal Point SetPoint 2 H SetPoint 2 L Decimal Point SetPoint 3 H SetPoint 3 L Decimal Point SetPoint 4 H SetPoint 5 L Decimal Point INPUTs/OUTPUTs Command Register
- 36 -
R/W R R R R R R R R R R R R/W R/W R R/W R/W R R/W R/W R R/W R/W R R/W W
ERRORS CODE OF 40001 ADDRESS ” Instrument Error” 40001 address 00 00 00 03
Conditions No Error Out of scale
00 05
overload
00 07
underload
Meanings The instrument is working The signal of the load cell is higher the maximum value of 19 mV/V The weight value is nine divisions higher than capacity (“CAPAC” parameter) The weight value is lower than -99999.The display will show “_ _ _ _ _ _”
LIST OF BIT OF 40005 ADDRESS “ Status Register” When bit is equal to 1 means the following conditions:
Bit 15 0 fixed
Bit 14 0 fixed
Bit 13 0 fixed
Bit 12 0 fixed
Bit 11 0 fixed
Bit 10 1 fixed
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Out of Over Under Valid Tare scale load load weight condition Note: Minimum weighing = value set into “0 – SEt”parameter. Tare condition = Net Weight function activated.
Bit 9 Bit 8 Negative Negative Gross Net Sign Sign
Bit 2 Minimum weighing
Bit 1 1 fixed
Bit 0 0 centre
LIST OF BIT OF 40024 ADDRESS “Input/Output” 15 -
14 -
13 -
12 -
11 -
10 In 2
9 In 3
8 -
7 -
6 -
5 -
In case of register writing , bit from 4 to 15 will be not considered.
LIST OF FUNCTION OF 40030 ADDRESS “ Command Register” “Command Register” allows the following commands:
Function 0007 0008 0009 0010 0021 0022
Command Net weight Semiautomatic zero Gross weight Restore Check Output as SetPoint Keyboard lock Keyboard unlock
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4 -
3 2 1 0 Out Out Out Out 4 3 2 1
RS 232 CONNECTION CABLE BETWEEN WT60 AND PC
PC
WT60 (COM) 1 6 2 7 3 8 4 9 5
1 6 2 7 3 8 4 9 5
9 POLES MALE
9 POLES FEMALE
CONNECTION CABLE FOR 24COLUMN PRINTER (MODEL P190) PRINTER
20 7
WT60 (COM) 2 3
3 8
2 5
9 POLES MALE
25 POLES MALE
- 38 -
RS 422 CONNECTION AMONG INSTRUMENTS WT60 WITH CONVERTER RS 232 TO CONNECT TO PC t r o P C 2 P 3 2 S R
e r l o 3 a t m c e e f n 2 P n 5 o 2 c 7
X T X R 0
g n i s a c r o t c e n n o c e h t o t d l e i h s e h t t c e n n o C
C D V 4 2
-
+
t r e r o l o 5 P a t c m C 2 f e e n 2 P 3 n 2 P o 9 S c 3 R
N O I T C E N N O C T S R I F
N I V 0 X T
X T U A L V N O C + X R R E T R E V N O C
X R
X R
E L R A O M T S C E E L N O N P O - 9 C
0 X 0 T 6 0 . + 0 X T 4 6 X T R 7 + W X R 9
E L R A O M T S C E E L N O N P O 9 C
0 X 0 T 6 0 . + T 4 0 X 6 X 7 T R + W X R 9
E L R A O M T S C E E L N O N P O 9 C
N O I T C E N N O C T S A L
+ XT
0 m 3 h
1 o 0 X 0 T 6 2 0 R . + T 4 0 X 6 X 7 1 T R R + W X R 9 0 m 3 h 1 o
- 39 -
R I A P 2 E L . B m A C 0 0 D 5 E T T H S I G N W T E L D X E A D L M E I H S E S U
