Module Diagnostic LEDs
Original instructions
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LED Panel Display
A LED display is located on the front panel of the module:
LED Diagnostics
Use the combined states of the LEDs to diagnose the channel and module status:
LED
Description
ERR
RUN
I/O
DL
IN0
OUT0
IN1
OUT1
OFF
Module is faulty or switched off.
OFF
BLK
–
BLK
–
Firmware download in progress.
ON
OFF
Module error detected.
FLK
OFF
–
No channel configured.
BLK
ON
–
Module has lost communication.
OFF
ON
ON
OFF
–
BLK
–
BLK
Actuator supply fault.
BLK
–
BLK
–
Sensor supply fault.
–
FLK
–
FLK
Output over load or short circuit.
FLK
–
FLK
–
Broken wired detected on MPU.
OFF
ON
OFF
–
Channels are operational.
ON
–
–
–
Input 0 active state.
–
–
ON
–
Input 1 active state.
–
ON
–
–
Output 0 energized.
–
–
–
ON
Output 1 energized. 
ON
LED is steady on 
OFF
LED is off 
FLK
Flickering: ON for 50 ms, OFF for 50 ms, repeat. 
BLK
Blinking: ON for 200 ms, OFF for 200 ms, repeat. 
–
This LED is not used in determining the channel or module status.