Mitsubishi QJ71MB91

To Next Page

To Previous Page

4 - 27

4.11 Diagnostics (FC: 08)

4.11.2 Restart communications option (sub-function code: 01)

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

Function code

Sub-function code

(0001

Clear setting of

Communications event log

0000

H: Not clear

FF00

H: Clear

(H)

Data

Function code

Function

code

(88

Exception

code*

Mitsubishi QJ71MB91 - Page 82