RTAC-01 User’s manual 4-1
Chapter 4 – Fault tracing
Diagnostic LEDs
There are three diagnostic LEDs on the RTAC-01
module. The CHA (green) and CHB (green) LEDs show
the activity on channels A and B. The WD/INIT (yellow)
LED shows the status of the module.
WD/INIT is lit when the drive is configuring the module
at power-up.
Option slot
installation
In case the LED does not go out after one second:
• The configuration has failed.
- Cycle the power supply of the drive.
• The module has a hardware failure.
- Ensure the 38-pin connector is properly inserted.
- Contact an ABB service representative.
I/O Module Adapter
installation
• There is no communication with the drive.
- Check that the drive is powered.
- Check the module node ID.
- Check that the fibre optic cables are connected
correctly (transmitters to receivers) and the
connectors properly inserted.
- Check the fibre optic cables visually for dirt or
flaws.
- Ensure the 38-pin connector is properly inserted.
- Try new fibre optic cables.
- Contact an ABB service representative.
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