Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 407

8 TROUBLESHOOTING
<Cause 1>
<Corrective action 1>
<Cause 2>
<Corrective action 2>
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M/S error or SW error is assumed.
1) Check for duplicate station number, duplicate control station designations
or switch setting error.
2) Take corrective action according to the contents of SW0047 and the error
code stored in SW0048.
Programmable controller error is assumed.
Check the programmable controller CPU error in the PLC diagnostics and
restore the CPU to normal. (Refer to Section 8.2.1.)
E
MELSEC-Q
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