Mitsubishi Electric MELSEC iQ-R08ENCPU - Get Communications Event Log (FC: 0 CH)

3 MODBUS STANDARD FUNCTION DETAILS
3.10 Get Communications Event Log (FC: 0CH)
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3
3.10 Get Communications Event Log (FC: 0CH)
Operation description
Acquires the communications event log into the master.
Request message format (from master to slave)
Response message format (from slave to master)
■ When completed successfully
Since C24 does not support any program commands, 0000H is stored in the program command status.
Returns the count values of the buffer memory listed below to the master.
• 'Communications event count' (Un\G32523 to Un\G32587)
• 'Bus message count' (Un\G32512/Un\G32576)
• 'Communications event log 1 to 64' (Un\G32544 to Un\G32575/Un\G32608 to Un\G32639)
Refer to the following for the counter descriptions, count range, and count clear methods.
Page 21 Checking communication conditions using a diagnostic counter
Page 38 Get Communications Event Counter (FC: 0BH)
For details on the communications event log, refer to the following.
Page 40 Communications event log
■ When completed with an error
0CH
Function code
0CH
(H) (L) (H) (L) (H) (L)
(0000H)
DataFunction code
Communications event
count value
Program command status
Communications
event log No. 0
Bus message count value Communications
event log No. 63
(0000H to FFFFH)
(0000H to FFFFH)
Number of
read bytes
Number of read bytes
8CH
Data
Exception code
Function code