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MELSEC-
6   TROUBLESHOOTING 
 
6.6.4 Troubleshooting when the "PW" LED of the CC-Link/LT remote I/O station has turned off 
For troubleshooting of the remote device station, refer to the user’s manual for your 
remote device station. 
 
 
The "PW" LED of the CC-Link/LT
remote I/O station has turned off
Is power supplied?
YES
Change the supply voltage to
within the specified range.
NO
Consult your local Mitsubishi service center
or representative, explaining a detailed 
description of the problem.
Complete
1 : Check for a short, reversed connection, wire breakage and insulation 
     displacement status.
Check terminal 24V
Check terminal 24G
2 : Measure the voltage using the check terminals of the terminating resistors.
Supply power.   1
Is the 
supply voltage within the 
specified range?
   2
NO
YES