Mitsubishi Electric MELSEC iQ-R04ENCPU - Return Slave Message Count (Sub-Function Code: 0 EH)

3 MODBUS STANDARD FUNCTION DETAILS
3.8 Diagnostics (FC: 08H)
31
3
Return slave message count (sub-function code: 0EH)
Operation description
Reads out the number of the slave message processing to the master (including receive of request messages from
broadcast).
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.
• 'Slave message count' (Un\G32518/Un\G32582)
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 (000EH) (0000H)
(H) (L)
DataFunction code Sub-function code
(H) (L)
(H) (L)
08H (000EH)
Function code Sub-function code
Slave message count value
Data
(0000H to FFFFH)
88H
Data
Exception code
Function code