Mitsubishi Electric Melsec Q Series User Manual page 153

6
FUNCTIONS
(b) When "Adding to the buffered data" is selected
The following shows the job processing when "Adding to the buffered data" is
selected.
Processing content
1 When the data cannot be sent to the database, it is stored to DB buffer
after the detection of a timeout.
2 When the data is stored to DB buffer (the selected resend buffer), the data
is stored to DB buffer without checking the status of communication
recovery.
3 The content of DB buffer is resent after recovery.
4 The job data which is started up before the resend completion is added to
the buffered data, and resend.
5 The data which is started up after the resend completion is sent normally.
Job startup
1) 2)
After sending,
timeout detected
Stored to DB buffer Stored to DB buffer
Job settings DB buffer
1)
Job1 Job1_Data
Job2
Job2_Data
2)
Job3 Job3_Data
Job10
Job11
Figure 6.14 When "Adding to the buffered data" is selected for the job
The data is sent to database in order of the trigger condition has been met.
Communication recovery
Job startup
Job startup Resend start
4)
3)
Resend DB Stored to DB buffer
buffer data
Database
Job1_Data
3)
Job2_Data
Job3_Data
4)
Job10_Data
5)
Job11_Data
6.1 DB Interface Function
6.1.10 DB buffering function
Resend
completed
Job startup
5)
Send
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