Mitsubishi Electric MELSEC iQ-R04ENCPU - Return Bus Communication Error Count (Sub-Function Code: 0 CH)

3 MODBUS STANDARD FUNCTION DETAILS
3.8 Diagnostics (FC: 08H)
29
3
Return bus communication error count (sub-function code: 0CH)
Operation description
Reads out the number of error messages detected on the line to the master.
Request message format (from master to slave)
Response message format (from slave to master)
■ When completed successfully
Returns the count value of the buffer memory listed below to the master.
• 'Bus communication error count' (Un\G32513/Un\G32577)
Refer to the following for the counter descriptions, count range, and count clear methods.
Page 21 Checking communication conditions using a diagnostic counter
■ When completed with an error
(H) (L)
08H (000CH) (0000H)
(H) (L)
DataFunction code Sub-function code
(H) (L)
(H) (L)
08H (000CH)
Function code Sub-function code
Bus communication
error count value
Data
(0000H to FFFFH)
88H
Data
Exception code
Function code