Objectives Upon completion of this module you will be able to define
The application of a Phase Logic Module
States of a PLM
Named Set for FAIL_MONITOR
9-3
Phase Logic Module
9-4
Phase Logic Module The Phase Logic Module is a module that defines the states of the phase and logic associated with each state.
9-5
Failure_Monitor
9-6
Failure_Monitor The Failure_Monitor continuously monitors failure conditions and sets the FAIL_INDEX equal to the fail number. When FAIL_INDEX is a non-zero, the phase transitions to the Holding state.
9-7
Failure_Monitor Defaults
9-8
FAIL_INDEX
9-9
Workshop - PLM Plant Shutdown Step 1.
Modify Name Set phase_failures. Add the name for the phase failure: Block valve 101 is open.
9-10
Workshop - PLM Plant Shutdown Step 2.
From DeltaV Explorer create PLM-SHUTDOWN. Change the Object type to Phase Logic Module.
9-11
Workshop - PLM Plant Shutdown Step 3.
Open PLM-Shutdown with Control Studio. Create a PLM parameter SHUTDOWN-LEVEL (floating point).
9-12
Workshop - PLM Plant Shutdown Step 4.
Add a Condition Block to FAIL_MONITOR to determine whether Tank101’s block valve is OPEN (XVSTAT-101). Set the Condition Block parameter Disable to 1.
Step 5.
Modify the expression of BLOCK1 to include an IF THEN statement to check OUT_D of the Condition Block and set FAIL_INDEX if the block valve is OPEN.
Set FIC-20X mode to CAS Start MTR-203 Enable monitoring of phase condition Wait for motor to start
Step 8.
Define RESTART_LOGIC.
Step 9.
Assign PLM to your controller.
Step 10. Save and download the PLM . Step 11. If an algorithm error occurs, use the Check the PLM.
button to check
Step 12. Add the PLM_ dynamo from frsModules dynamo set to an operator display. Step 13. Optional: Define logic for Stop and Abort. 9-16
Workshop - PLM Plant Shutdown
Step 14. Toggle Phase Owner to External by clicking on the toggle button.
9-17
Workshop - PLM Plant Shutdown
Step 15. Click on the Phase Command ellipse button to display a list of valid phase commands. Issue the Start command. 9-18
Workshop - PLM Plant Shutdown
Step 16. While the PLM is running, Open XV-101 to cause a failure. Verify PLM runs HOLD logic. Step 17. Verify Failure State utilizing the Detail Faceplate. 9-19
Workshop - PLM Plant Shutdown
Step 18. Clear Failures.
Step 19. Issue the Restart command. 9-20
Workshop - PLM Plant Shutdown
Step 20. Issue a Hold command while PLM is running. Step 21. Restart PLM after Hold logic is complete.
9-21
Workshop - PLM Plant Shutdown
Step 22. Reset PLM when it is complete. Also verify that PLM transitions to Idle. 9-22