Mitsubishi Electric MELSEC iQ-R08ENCPU - Return Bus Message Count (Sub-Function Code: 0 BH)

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3 MODBUS STANDARD FUNCTION DETAILS
3.8 Diagnostics (FC: 08H)
Return bus message count (sub-function code: 0BH)
Operation description
Reads out the number of 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 message count' (Un\G32512/Un\G32576)
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 (000BH) (0000H)
(H) (L)
DataFunction code Sub-function code
(H) (L)
(H) (L)
08H (000BH)
Function code Sub-function code
Bus message count value
Data
(0000H to FFFFH)
88H
Data
Exception code
Function code