Mitsubishi Electric MELSEC iQ-RJ71C24-R4 - Return Bus Character Overrun Count (Sub-Function Code: 12 H)

3 MODBUS STANDARD FUNCTION DETAILS
3.8 Diagnostics (FC: 08H)
35
3
Return bus character overrun count (sub-function code: 12H)
Operation description
To the master, reads out the number of times the request message size exceeds the upper limit.
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.
• 'Character overrun count' (Un\G32514/Un\G32578)
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 (0012H) (0000H)
(H) (L)
DataFunction code Sub-function code
(H) (L)
(H) (L)
08H (0012H)
Function code Sub-function code
Bus character overrun
count value
Data
(0000H to FFFFH)
88H
Data
Exception code
Function code