Mitsubishi Electric Melsec Q Series User Manual page 232

7
MES INTERFACE FUNCTION CONFIGURATION TOOL
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- 74 7.10 Job Setting
7.10.2 Setting items in Trigger conditions
2) Program example
The following is a program example in which a job is executed when an
execution request (X100) from the outside turns ON.
When system switching occurs during [Handshake operation], the processing
to retry is incorporated.
Figure 7.59 Program example when Redundant CPU is used
*1 The same job cannot be restarted during the job operation.
After switching systems, the job waits time set by Retry timer (30 seconds in program example).
*2 Completion notification (M200) may not be turned OFF at system switching.
The job restart processing is performed at the next scan.
3) Precautions
Executing the same job twice is necessary when switching systems.
Create the system in view of executing the same job twice.
(Example) When [INSERT] is used at [Communication action]
When the record of the same data (production number etc.) is inserted to the
table of data base twice, create the information system to use the latest data.
Sets In-process flag at
processing request.
Resets In-process flag
at normal completion.
Processing at system
switching
For XML processing
Send data generation
Job restart processing
Receive data processing
Processing for normal
job execution
Error handling
Processing for failed
job execution
Retry timer (30 seconds)
Job restart processing
Resets Completion
notification
*
*2