Fault Tracing; Contents Of This Chapter; Diagnostic Leds - ABB FEN-01 User Manual

Fault tracing

Contents of this chapter

This chapter shows how to trace faults with the status LEDs on the TTL Encoder
Interface module.

Diagnostic LEDs

The FEN-01 is equipped with two diagnostic LEDs. The STATUS LED describes the
status of the FEN-01 and the ENC ST LED the status of the encoders. Description of
the LED signals is presented below.
Colour
STATUS LED Green
Orange
Red
ENC ST LED Green
Red
Orange
Red/orange swapping
Red flashing
Orange flashing
Note: When using FEN-01 with ACS880 the status of ENC ST LED is updated after
encoder fault reset is done.
Description
OK
Not initialized or communication fault to control
unit
Not in use
Encoder(s) OK
TTL encoder (X31) fault
TTL + encoder (X32) fault
TTL encoder fault X31 and TTL + encoder X32 fault
TTL encoder (X31) warning
TTL + encoder (X32) warning
Fault tracing 31
6