ABB FEN-01, User Manual, Page: 24 / 32

Installation
24
Phasing
When the encoder is connected correctly, running the drive in the
Forward (positive speed reference) direction should produce a
positive encoder speed feedback.
On incremental encoders, the two output channels, usually
marked 1 and 2 or A and B, are 90° (electrical) apart from each
other. When rotated clockwise, most encoders – but not all – have
channel 1 leading channel 2 as illustrated below. Determine the
leading channel by referring to the encoder documentation or by
measuring with an oscilloscope.
The encoder output channel that leads when the drive runs
Forward should be connected to FEN-01 input A, the output
channel that trails to FEN-01 input B.
The zero reference output channel (usually marked 0, N or Z)
needs to be connected in positioning applications only.
Programming
The FEN-01 is programmed through drive parameters. These
parameters must be checked and adjusted according to the
encoder data sheet. For further information, see the drive
Firmware Manual .
A+ or A or 1
A- or A or 1
B+ or B or 2
B- or B or 2
Z+ or Z or 0
Z- or Z or 0