delta v course 7009-9
TRANSCRIPT
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TM
Phase Logic Modules (PLMs)
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ObjectivesUpon 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
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Phase Logic Module
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Phase Logic ModuleThe Phase Logic Module is a module that defines the states of the phase and logicassociated with each state.
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Failure_Monitor
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Failure_Monitor The Failure_Monitor continuously monitors failure conditions and sets theFAIL_INDEX equal to the fail number. When FAIL_INDEX is a non-zero, the
phase transitions to the Holding state.
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Failure_Monitor Defaults
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FAIL_INDEX
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Workshop - PLM Plant ShutdownStep 1. Modify Name Set phase_failures. Add the name for the phase failure:
Block valve 101 is open.
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Workshop - PLM Plant ShutdownStep 2. From DeltaV Explorer create PLM-SHUTDOWN. Change the Object
type to Phase Logic Module .
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Workshop - PLM Plant ShutdownStep 3. Open PLM-Shutdown with Control Studio. Create a PLM parameter
SHUTDOWN-LEVEL (floating point).
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Workshop - PLM Plant ShutdownStep 4. Add a Condition Block to FAIL_MONITOR to determine whether
Tank101s block valve is OPEN (XVSTAT-101). Set the ConditionBlock 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.
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Workshop - PLM Plant Shutdown
Step 6. Define RUN_LOGIC.
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RUN_LOGIC
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STOP MTR-203
SHUTDN TANK101
SET T201 LEVEL
CLOSE FIC-20X
Perform actions necessary to shutdown Tank101 utilizingconfirms
Wait for above devices to transition utilizing the PENDING_CONFIRMS parameter
Enable monitoring of phase condition (set Disable parameter to 0).Set LIC-20X SP to SHUTDOWN-LEVEL
Wait for level to be satisfied.
Stop MTR-203
Wait for motor to stop.
Close FIC-20X.
Disable monitoring of phase condition (set Disable parameter to 0).
Wait for flow valve to close. Note: Assumption for RUN_LOGIC towork, process is running with the CascadePair in the normal mode.
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Workshop - PLM Plant Shutdown
Step 7. Define HOLD_LOGIC.
Failure detected (/FAIL_INDEX.CV!=0) True
Disable monitoring of phase condition
Stop MTR-203 and confirmClose FIC-20X and confirm
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+FAIL SAFE
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STOP DRAIN
HOLD STATE
Wait for above devices to transition utilizing thePEND_CONFIRMS parameter
Close Tank101 block valve
Step active for at least 2 sec(Step parameter - TIME )
HOLD_LOGIC
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Set FIC-20X mode to CASStart MTR-203Enable monitoring of phase condition
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RESTART DRAIN
Wait for motor to start
RESTART_LOGIC
Workshop - PLM Plant Shutdown
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 button to check the PLM.
Step 12. Add the PLM_ dynamo from frsModules dynamo set to an operator display.
Step 13. Optional: Define logic for Stop and Abort.
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Workshop - PLM Plant Shutdown
Step 14. Toggle Phase Owner to External by clicking on the toggle button.
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Workshop - PLM Plant Shutdown
Step 15. Click on the Phase Command ellipse button to display a list of valid phase commands. Issue theStart command.
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Workshop - PLM Plant Shutdown
Step 16. While the PLM is running, Open XV-101 to cause afailure. Verify PLM runs HOLD logic.
Step 17. Verify Failure State utilizing the Detail Faceplate .
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Workshop - PLM Plant Shutdown
Step 18. Clear Failures . Step 19. Issue the Restart command.
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Workshop - PLM Plant Shutdown
Step 20. Issue a Hold command while PLM is running.
Step 21. Restart PLM after Hold logic is complete.
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Workshop - PLM Plant Shutdown
Step 22. Reset PLM when it is complete. Also verify that PLM transitions to Idle .