01 IK IESYS e Communications Overview

Automation and Drives

Commun Com munica icatio tion n in Automati Automation on

SITRAIN IK-IESYS / Communication Overview

Contents

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March/2007 © Siemens AG 2007 - Subject to change witho ut prior notice

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The The aut autom omati ation on hiera hierarch rchy y ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... Proce Process/ ss/fie field ld commu communi nicat cation ion,, data data commu communic nicati ation on ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... ..... ...... ...... ...... ...... ...... ...... ...... ...... ..... .. SIMATI SIMATIC C subne subnets ts ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... Point Point-t -to-p o-poin ointt link link mo modu dules les ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... ..... ...... ...... ...... ... EIB, EIB, Europ Europea ean n Insta Installa llatio tion n Bus Bus (KNX) (KNX) in in build building ing autom automati ation on ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... .. Actua Actuator tor Senso Sensorr Inter Interfa face, ce, AS-i AS-i bus bus ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... MPI MPI commu communic nicati ation on ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... ..... ...... ...... ...... ..... .. PROF PR OFIBU IBUS S ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... ..... ...... ...... ...... ...... ...... ...... ...... ..... .. Industri Industrial al Etherne Ethernett ...... ........... ........... ............ ........... .......... .......... .......... ........... ............ ........... .......... .......... .......... ........... ........... ........... ........... .......... .......... .......... .......... .......... .......... ..... PROFINE PROFINET T based based on Industria Industriall Ethernet Ethernet ...... ........... .......... .......... .......... .......... ........... ........... .......... .......... ........... ........... .......... ........... ........... .......... .......... ........ ... Router Rou ters s ...... ........... .......... .......... ........... ........... .......... ........... ........... .......... ........... ........... .......... ........... ............ ............ ............ ........... .......... ........... ........... ........... ........... ........... ........... ........... ........

SITRAIN traini training ng for Automation and Industrial Solutions

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IK-IESYS Communication Communication in Automation Automation


The automation hierarchy

Management level

Industrial Ethernet

Cell level PROFIBUS/MPI Field level AS interface

Actuator/ sensor level


Management level

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Higher-level tasks which are important to the overall operation of the system are processed at the management level (management functions). In addition to saving process values, this also includes optimizing and analyzing process functions as well as their output in the form of logs. The data required for this purpose are compiled and processed company-wide. It is also possible to access different sites from the management level. The number of nodes can exceed 1,000.

Cell level

All automation and optimization tasks are processed independently at cell level. Programmable controllers, PCs, and HMI units are interconnected at cell level.

Field level

The field level is the link between the systems and the programmable controllers. The field devices monitor, signal and forward the commands from cell level to the systems. At this level, the volume of data transferred is relatively small. Hierarchical communication is typical, i.e., several field devices communicate with one master.

Actuator/sensor level At this level, a master communicates with the actuators and sensors connected to its subnet. It is characterized by fast response times for a few data bits.

SITRAIN training for Automation and Industrial Solutions

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IK-IESYS Communication in Automation


Process/field communication, data communication


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Process or field communication Process or field communication is used to link sensors and actuators to a controller. The connection can be made via an interface integrated into the CPU or using interface modules (IMs, CPs). SIMATIC and SIMOTION can be used with PROFIBUS DP and AS-Interface as well as EIB, which is the bridge between factory automation and building automation. Data communication Data communication is used for data exchange between programmable controllers or between programmable controllers and intelligent partners such as PCs, computers, etc. SIMATIC and SIMOTION support data communication via Industrial Ethernet and PROFIBUS.


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SIMATIC subnets PG720

OPs

PC, OS

PG

MPI network Industrial Ethernet Point-to-point

PROFIBUS

SIMATIC S5

S7-400

M7-400

S7-300

Cell level

- SINUMERIK, RCM - TI 505 - non-SiemensPLC

PROFIBUS DP DP/AS-I link ET 200C

ET 200B/L AS-i (actuator-sensor interface) AS-i submodules

AS-i power supply Field device with AS-i ASIC SITRAIN IK-IESYS / Communication Overview

Actuatorsensor level

Sensors and actuators

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SIEMENS offers the following subnets for the different communication tasks at cell level (non-time-critical) and field level (time-critical). Point-to-point connection Point-to-point connections are used primarily for non-time-critical data exchange between two stations or for the connection of devices such as OPs, printers, barcode scanners, magnetic stripe card scanners, etc. AS-Interface

The actuator-sensor interface is a subnet for the lowest process level of a system. Binary sensors and actuators can be connected.

MPI

The MPI subnet has been designed for tasks at cell level. The MPI (multi-point interface) is the multi-point interface in the SIMATIC S7. It has been designed as a programming device interface, i.e. for the connection of programming devices (commissioning and testing) and OPs (operator control and monitoring). The MPI subnet can also be used to link just a few CPUs.

PROFIBUS

PROFIBUS is the network for the cell and field level in the open, multi-vendor SIMATIC communications network. Two versions are available: • •

Industrial Ethernet

At the cell level as PROFIBUS for non-time-critical communication between intelligent nodes with equal priority. As PROFIBUS DP fieldbus for time-critical, cyclic data communication between intelligent masters and field devices.

Industrial Ethernet is the network used at management and cell level in the open, multi-vendor SIMATIC communications network. Industrial Ethernet has been designed for non-time-critical transmission of large data volumes and can be used to connect to networks on different sites via gateways.


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Point-to-point link modules  



1 interface 9.6 Kbit/s to 76 Kbit/s Protocols: ASCII  3964(R)  RK 512  Printers  

Programming devices PCs, computers

Scanners barcode readers, identification systems

Opto-electronics

Drivers can be reloaded

Printers 

Robot controls

S7-300

Physical characteristics:  20 mA (TTY) RS 232C (V.24)  

Weighing systems, Controllers

RS 422/485 (X.27)

SIMATIC S5


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A point-to-point link permits data to be exchanged over a serial interface between • Programmable controllers • Programmable controllers and PGs/PCs • Programmable controllers and non-Siemens systems Characteristics of a point-to-point link using the example of the CP341


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EIB, European Installation Bus (KNX) in building automation Powerline 230 V

Powerline bus coupling unit DP/EIB link Powerline coupler

KNX EIB pushbutton unit

EIB binary input modules

Wind sensor

Drive


EIB, KNX

.

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The EIB (European Installation Bus) is now commonly used in Europe or building services. It is supported by many representatives of the electrical and building automation sector who have come together to form the European Installation Bus Association (EIBA) A defined standard interface allows products by different vendors to be used in a common installation. One of the objectives of the EIB technology is to control the operational functions and processes in a building by means of the common bus cable. For control purposes, a twisted pair bus cable is routed through the building. In addition to transmitting the control messages, it also transmits the 24 V supply for the bus nodes. EIB is a distributed, event-driven serial bus system based on CSMA/CA. It is used to acquire, control,monitor, and signal all operational functions in a building or large facility. The ETS2 configuring tool is used to configure the system on the EIB side.


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Actuator-sensor interface, AS-i bus


AS-Interface

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AS-Interface is an open, international standard based on EN 50295 and IEC 62026-2 for process and field communication. It is supported by the world's leading vendors of actuators and sensors. AS-Interface is a single-master system. For the Siemens programmable controllers, there are communications processors (CPs) and routers (links), which control the process or field communication as masters, and actuators and sensors which can be addresses as AS-Interface slaves.


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MPI communication Data exchange: 187.5 Kbit/s to 12 Mbit/s Up to 32 bus nodes, up to 32 active connections per CPU Communication services:  



PG/OP communication functions Global data communication for small data volumes, without programming overhead S7 standard communication for small data volumes up to 76 bytes

Cost-effective communication integrated as standard


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MPI, multi-point interface MPI supports a variety of baud rates to help ensure the accuracy of the transmitted data. An MPI subnet can connect any combination of SIMATIC devices: • • •

S7 controllers (such as S7-300, S7-400 or C7) HMI devices (such as operator panels or touch panels) Programming device (PG) or programming station (PC) Every SIMATIC CPU supports the MPI protocol. (S7-200 is only an MPI slave device.) You do not need a CP module (communications processor) to connect an S7 device to an MPI network.


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PROFIBUS


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PROFIBUS DP

PROFIBUS is a bus system for process and field communication in cell networks with a small number of nodes and with field devices for data communication compliant with IEC 61 158/EN 50 170. It is open for the connection of non-Siemens components which are also compliant with the relevant standards. For fast, cyclic data exchange with field devices

PROFIBUS PA

For applications in process automation and in the intrinsically-safe area

PROFIBUS

Data communication PROFIBUS FDL and for data communication between programmable controllers of various FMS vendors.


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Industrial Ethernet


Industrial Ethernet

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Industrial Ethernet, which is based on the IEEE 802.3 and IEEE 802.11 standards, allows you to connect your programmable controller to your office networks. Industrial Ethernet supports information technology (IT) services which you can use to access and work with production data from the office environment.


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PROFINET based on Industrial Ethernet

PROFINET IO PROFINET CBA SITRAIN IK-IESYS / Communication Overview

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PROFINET

PROFINET is the innovative and open Industrial Ethernet standard (IEC 61158) for industrial automation. With PROFINET, devices can be linked from the field level all the way to the management level. PROFINET permits integrated communication, supports system-wide engineering and uses IT standards all the way down to the field level.

PROFINET IO

PROFINET IO enables distributed field devices (IO devices such as signal modules) to be connected directly to Industrial Ethernet. During the familiar configuration process with STEP 7, these field devices are assigned to a central controller ("IO controllers"). Existing modules or devices can continue to be used with PROFINET-compatible interfaces or links, thereby safeguarding investments already made by PROFIBUS or AS-Interface users. A configuration with standard and fail-safe modules in a single station is also possible. An IO Supervisor serves HMI and diagnostics purposes – as on PROFIBUS – using hierarchical diagnostics screen forms (overview and detailed diagnostics). User data is transferred by means of real-time communication; configuration and diagnostics by means of TCP/IP or IT standards. The simple engineering which proved its worth on PROFIBUS has been used for PROFINET also. From the point of view of programming with STEP 7, it makes no difference whether an I/O device is accessed via PROFIBUS or PROFINET.

PROFINET CBA

PROFIBUS International has defined a standard for implementing modular plant structures: PROFINET CBA (Component Based Automation). Modularization has already proven its worth in mechanical and plant engineering. Parts that are required frequently are premachined and can quickly be combined to build an customized unit following the placing of an order. With the help of software components, PROFINET CBA is extending modularization to the field of plant automation technology. Software components are encapsulated, reusable software functions. They can be individual technological functions such as controllers or user programs for entire machines. Like blocks they can be flexibly combined and easily reused – regardless of their internal programming. Communication between software components takes place exclusively via component interfaces. Outwardly, only the variables required for interaction with other components can be accessed on these interfaces. Software components are created with STEP 7 or other vendor-specific tools. SIMATIC iMap is used for system-wide configuration based on the graphical interconnection of components.


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Routers


Routers

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Routers from one bus system to another are implemented using links, controllers (PLCs) or PCs. On controllers or PCs, integrated interfaces and communications processors (CPs) can be used for this. Links forward data autonomously from one network to the other.

Available links •

IE/PB Link and IE/PB Link PN IO for the transition from Industrial Ethernet to PROFIBUS (also for fail-safe communication)

•

IE/AS-i LINK PN IO for the transition from Industrial Ethernet to AS-Interface

•

IWLAN/PB Link PN IO for the transition from IWLAN to PROFIBUS

•

PB DP/PB DP and PB DP/PB PA for linking DP/DP and DP/PA networks

•

DP/AS-i LINK Advanced and DP/AS Interface Link 20E for the transition from PROFIBUS to AS-Interface

•

DP/EIB Link for the transition from PROFIBUS to KNX/EIB

In the case of PLCs, e.g., SIMATIC S7-200, S7300, S7-400, SINUMERIK or SIMOTION C, data are exchanged between the individual networks by means of communications processors or integrated interfaces. Data are linked by means of a controller, and thus forwarded to the other network as preprocessed data.


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01 IK IESYS e Communications Overview

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