Digital Inputs For Position Latching (X44); General Encoder Phasing Principle - ABB FEN-11 User Manual

Digital inputs for position latching (X44)

￭
1
1
2
2
VCC
0V
Cable pair Signals name
number
+24V_C
1
COM_C
DI_1+
2
DI_1-
DI_2+
3
DI_2-

General encoder phasing principle

When the encoder is connected correctly, running the drive in the Forward (positive
speed reference) direction should produce a positive encoder 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
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.
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
Connecting header pin
number (6-pins)
1
2
3
4
5
6
DI1+
DI1-
DI2+
DI2-
VCC
COM_C
Notes
Installation 31
3
4
5
6
1
2