Trigger Buffering Function - Mitsubishi Electric Melsec Q Series User Manual

6
FUNCTIONS

6.1.5 Trigger buffering function

When multiple sets of trigger conditions (conditions for data transmission) are met in a
concentrated manner, their data and trigger times are buffered in the module's internal
memory so that actions (data operation/transmission) can be executed later using the
buffered data.
Even if the frequency of data transmission triggers is high, jobs are executed without
missing any trigger.
To utilize the trigger buffering function, enable [Trigger buffering] at each Job settings.
(1) Trigger buffering function
[MES interface module]
[Normal case]
Job 1
Trigger
conditions met
6
- 7 6.1 DB Interface Function
6.1.5 Trigger buffering function
This section explains the operations of the job for which [Trigger buffering] is enabled.
(a) In a normal case (Trigger interval
• When trigger conditions are met, tag data and trigger time are stored in the
trigger buffer.
• Based on the information in the trigger buffer, an action is executed
immediately.
Trigger buffer
Time
Processing time for action)
Job 1
Action
execution
Time
Figure 6.5 In a normal case
Sending
data
Database