Fault Tracing; Contents Of This Chapter; Diagnostic Leds; Cable Fault Diagnosis - ABB FEN-31 User Manual

Fault tracing

Contents of this chapter

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

Diagnostic LEDs

FEN-31 is equipped with two diagnostic LEDs. The STATUS LED describes the status
of FEN-31 and the ENC ST LED the status of the encoders. Description of the LED
signals is presented below.
Colour
Green
STATUS LED Orange
Red
Green
ENC ST LED
Orange
Note: When using FEN-31 with ACS880 the status of ENC ST led is updated after
encoder fault reset is done.

Cable fault diagnosis

Cable fault diagnostics are implemented for the HTL encoder input. The cable fault
diagnostics function samples voltage on each of the six signal connections to detect
a missing signal wire connection.
For details about HTL encoders supported by the cable fault diagnostics function,
see the drive Firmware manual .
Description
OK
Not initialized or communication fault to control unit
Not in use
Encoder OK
Encoder fault
Fault tracing 31
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