Function Description; Table 29: Function Description - Inputs - WAGO 750-637/040-001 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 29: Function Description – Inputs
Input
A, /A,
B, /B
C, /C
Latch
Gate
Ref
Screen
+24 V
0 V
Manual
Version 1.1.0
750-637/040-001 Inc. Encoder 24 VDC Diff 32Bit XTR
Description Function
Quadrature inputs,
Track signal A or B of the incremental encoder
24 V, differential
Track signal for the index channel of the
incremental encoder.
Initial point input, Based on the operating mode, the content of the
24 V, differential counter is placed in the Latch register, or the set
value also loaded to the counter on a positive
edge at this input.
Based on the operating mode, the content of the
LATCH input, counter is placed in the Latch register, or the set
24 V value also loaded to the counter on a positive
edge at this input.
Gate input, The counting process is disabled when 24 V is
24 V applied to the Gate input.
During a reference run the index impulse is only
Ref input,
evaluated when an additional sensor signal (Ref)
24 V
is present.
Connection for shielding of the encoder line.
Shielding The shield (screen) is directly connected to the
DIN rail.
Supply voltage 24 V supply voltage for the I/O module
Ground Ground for 24 V supply voltage
WAGO-I/O-SYSTEM 750 XTR