Flowchart For When The "Safety" Led Does Not Turn On - Mitsubishi Electric MELSEC QS SERIES User Manual

9
TROUBLESHOOTING

9.2.4 Flowchart for when the "SAFETY" LED does not turn on

The following shows the flowchart for when the "SAFETY" LED does not turn on at power
ON of the safety remote I/O module or during operation of the programmable controller.
"SAFETY" LED is
not turned on.
NO
Is the "SAFETY"
LED turned on right after
reset cancel/power-on?
YES
NO
Is the proper transmission
speed set?
YES
NO
Is the proper link ID set?
YES
NO
Is the proper station number set?
YES
NO
Is the data link on at the safety
master module side?
YES
NO
Don't multiple master stations
exist on the same data link?
YES
1
9.2.4 Flowchart for when the "SAFETY" LED does not turn on
Replace the safety remote I/O module.
Match the transmission speed setting
switch of the safety remote I/O module to
the setting of the safety master module.
Match the safety remote I/O module
link ID setting switch to the setting of
the safety master module.
Match the station number setting switch
of the safety remote I/O module to the
setting of the safety master module.
Perform troubleshooting of the safety
master module.
(For troubleshooting of the safety master
module, refer to CC-Link Safety System
Master Module User's Manual.)
Set one safety master module on the
same data link.
9.2 Troubleshooting with LEDs
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