Function Description; Table 36: Function Description - Inputs - WAGO 750-637 Series Manual

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Function Description

5 Function Description
</dg_ As a rule, incremental encoders supply two output signals from the encoder
tracks, offset by 90°. These signals are designated A and B. The difference
between the input signals is evaluated in the incremental encoder I/O module.
In addition to the two track signals, incremental encoders normally also have an
index track. This track contains only one impulse per rotation of the encoder.
From this impulse and the counter value, the absolute position of the encoder
can be determined within a revolution. As the index impulse is equal to the length
of a line of the track signals, the latch process should always be carried out with
the same direction of rotation.
Table 36: Function Description – Inputs
Input
A, /A,
B, /B
A,B
C, /C
C
LATCH
Manual
Version 1.6.1
Description
Quadrature inputs,
RS-422
Quadrature inputs,
24 V, differential
Quadrature inputs,
24 V, single-ended
Initial point input,
RS-422
Initial point input,
24 V, differential
Initial point input,
single-ended
LATCH input,
24 V
Public
750-637 Incremental Encoder Interfaces
I/O Module Function
750-637
750-637/000-003
Track signal A or B of the
750-637/000-001
incremental encoder
750-637/000-004
750-637/000-002
750-637 Track signal for the index
channel of the incremental
750-637/000-003
encoder.
750-637/000-001
Based on the operating
mode, the content of the
750-637/000-002
counter is placed in the
Latch register, or the set
value also loaded to the
750-637/000-004
counter on a positive edge
at this input.
750-637 Based on the operating
mode, the content of the
750-637/000-001
counter is placed in the
750-637/000-002
Latch register, or the set
750-637/000-003
value also loaded to the
counter on a positive edge
750-637/000-004
at this input.
WAGO I/O System 750