Mitsubishi QJ71MB91, User Manual

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4
MODBUS(R) STANDARD FUNCTIONS
4.11 Diagnostics (FC: 08)
4.11.2 Restart communications option (sub-function code: 01)
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4.11.2 Restart communications option (sub-function code: 01)
Initializes the communication port of the receiving channel side and restarts the slave
function.
Restart is performed after returning the response message corresponding to a request
message.
The operation status returns to online mode when it was in the listen only mode.
The following data are cleared when executing the restart communications option.
• Data being received
• CH1/2 side error response code storage area in the buffer memory (address:
0002
H
/0004
H
)
*1
• CH1/2 side detailed LED status storage area in the buffer memory (address:
0006
H
/0007
H
)
*1
• Diagnostic counter ( Section 11.3)
• The ERR. LED OFF
*2
• Communications event count ( Section 4.12)
• Communications event log ( Section 4.13)
*3
* 1 Clears only the receiving channel side area.
* 2 Clears the errors of the channel that has received the request message.
As the errors of other channels are not cleared, the LED will not turn off if an error has occurred on
any other channel.
* 3 Clears the data when the communications event log clear is specified in the request message.