Siemens SIMATIC PCS 7 OSx, Руководство оператора

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Action Requests
7-16
SIMATIC PCS 7 OSx 4.1.2 Operator
Example of Responding to Action Requests (continued)
When the system enters the Operate state, the controller in this example
checks to see if the reactor tank is empty.
If the tank is empty, the controller closes the output valve and triggers the
BATCH_SELECT action request with the LL_Alarm bit of trigger tag
REACTOR27W. The Operator Change Log records the trigger event,
including the date, time, text (with embedded values), answer options, and
the request’s urgency.
If the tank is not empty, the output valve remains open until all the fluid
drains from the tank.
The first action request is triggered by an empty reactor tank. To answer
the request, the operator should follow these steps:
1. Select the action request icon. The screen displays the Action Request
Summary. The summary shows the BATCH_SELECT action request
( Figure 7-7 ). It is a Multi-Choice request.
2. If the Daily Production Plan calls for Reagent 64 to be produced, place
the cursor on the Reagent_64 option and select it.
3. Enter a comment stating the reason why Reagent 64 was chosen.
4. Select the
Commit
option. OSx commits the choice by writing the value
0x2000 (for Reagent 64) to the attribute of tag 27WCONTROL. OSx
changes the reset bit for the BATCH_SELECT request from 1 to 0.
The Operator Change Log records the comment and the answer. The
two chemicals that make up the Reagent 64 mixture begin to flow into
the reactor tank.
The request is now complete.
REACTOR 27W IS EMPTY AND AVAILABLE FOR USE. CONSULT THE
DAILY PRODUCTION PLAN TO DETERMINE WHICH REAGENT NEEDS
TO BE PRODUCED NEXT.
Comment:
BATCH_SELECT 19--AUG 11:07:14
User ID:
1 of 1
REAGENT_147
REAGENT_64
REAGENT_39
fmacsumm: Action Request Summary
URGENT
View Commit Dismiss
Batch ID:
Figure 7-7 BATCH_SELECT Action Request
Starting the
Process
Answering the
BATCH_SELECT
Action Request