Mitsubishi QJ71MB91, Руководство пользователя

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4
- 27 4.11 Diagnostics (FC: 08)
4.11.2 Restart communications option (sub-function code: 01)
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MODBUS(R) STANDARD FUNCTIONS
(1) Request message format (Master Slave)
(2) Response message format (Slave Master)
(When completed normally)
The slave returns the request message received from the master without change.
However, if a request message is received during listen only mode, the status will only
return to online mode and no response message will be returned.
(When completed with an error)
* 1 Exception and error codes are stored in the buffer memory in the case of error completion.
Refer to the following for storage location, confirmation methods, and detailed contents.
Section 11.4
Figure 4.30 Restart communications option (Request message)
Figure 4.31 Restart communications option (Exception message)
(L)
Data
(L)
Function
code
(08
H
)
Function code Sub-function code
Sub-function code
(0001
H
)
Clear setting of
Communications event log
0000
H
: Not clear
FF00
H
: Clear
(H)
(H)
Data
Function code
Function
code
(88
H
)
Exception
code*
1