Mitsubishi Electric Melsec Q Series User Manual page 152

6
FUNCTIONS
(8) Operation while data is being stored to DB buffer
6
- 19 6.1 DB Interface Function
6.1.10 DB buffering function
The job processing which is started up while the data is being stored differs
depending on the operation settings of resend buffer selected on each job.
Related settings
• Setting of each job (
• Operation setting of resend buffer (
(a) When "Immediate sending (Do not add to the buffered data)" is selected
The following shows the job processing when "Immediate sending (Do not add 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
status of communication recovery is checked for each time when the job is
*1
started up.
If the communication has not been recovered, the data is stored to DB
buffer.
3 The content of DB buffer is resent after recovery.
4 The job data which is started up before the resend completion is sent
immediately.
Job startup
1)
After sending,
timeout detected
Stored to DB buffer
Job settings
Job1
Job2
Job3
Job10
Figure 6.13 When "Immediate sending" is selected for the job
*1 When using MES interface module whose first five digits of serial No. is "09101" or earlier, the
processing of DB buffering differs.
Appendix 1.3 (1) (a) For a MES interface module whose first five digits of serial No. is
"09101" or earlier
The new job data whose trigger condition is met may be sent to the database
before the data stored to DB buffer.
Section 7.10.4)
Section 7.6.4 (8))
Communication recovery
Job startup Resend start
2)
Stored to DB buffer
after confirmation of
Resend DB buffer data
recovery
DB buffer
1)
Job1_Data
Job2_Data
3)
2)
Job3_Data
Job startup
4)
Send
3)
Database
Job1_Data
Job2_Data
4)
Job10_Data
Job3_Data