Rockwell Automation 2705 RediPanel Push Button Module - Manual (Page 69)

Chapter 5
Maintenance and Troubleshooting
5–3
The green COMM indicator (on front of module) indicates communication
faults or errors. The COMM LED indicates one of 3 states:
•
Off
•
On
•
Blinking
COMM State What it Means: What to do:
OFF
1. Module is not receiving input power.
2. The Module is operating correctly, but no communication is
occurring at this time.
3. Module is in the first second of the Push-to-Test cycle.
4. Module is the last rack, but the DIP switch indicating this
state is not in the OFF position.
5. The PLC, scanner, or sub I/O scanner is not configured to
recognize the rack number of the Module.
6. The baud rate of the module is not set to match the baud
rate of the PLC’s scanner.
1. Nothing
2. Check the Remote I/O Link wiring; the blue and clear wires
of your twin-axial cable may be interchanged.
3. Nothing
4. Change the DIP switch setting.
5. See Chapter 2.
6. Set the DIP switches to the correct baud rate.
ON
1. The Module is operating correctly with no communication
faults.
2. Push-to-Test button pushed and the module has been in
the test mode for more than one second.
1. Nothing
2. Nothing
1. PLC is in the program or test mode and communications
with the module have been established.
1. Nothing
Blinking
w v b b
2. The module rack size does not match the size of the
configured PLC.
2. Reconfigure the module or PLC to a matching rack size.
Using the COMM Indicator