Mitsubishi Electric QJ71MB91 User Manual page 87

4
MODBUS STANDARD FUNCTIONS
POINT
1. Whether the QJ71MB91 has been switched to listen only mode or not can be
checked in the Communications mode of the buffer memory (address: 0F0D
0F4D ).
H
0000 : Online mode
H
0001 : Listen only mode
H
2. The listen only mode can be changed to online mode by either of the
following:
• Restart communications option (
• Power OFF ON, programmable controller CPU reset
4.11.5 Force listen only mode (sub-function code: 04)
Section 4.11.2)
4.11 Diagnostics (FC: 08)
1
/
H
2
3
4
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6
7
8
4
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