Functional Description - WAGO I/OSYSTEM 750 Series Manual

38 • 750-637/000-002 [Inc.Enc./24V/32Bit/S.E.]

Functional Description

2.1.3.6 Functional Description
Typically, incremental encoders supply two output signals of the encoder
track, both 90° offset. These signals are designated A and B. The difference of
the input signals is evaluated in the incremental encoder I/O module.
Usually, incremental encoders have an index track in addition to the two track
signals. This index track only produces one pulse per one full encoder revolu-
tion. This pulse and the counter reading can be used to determine the absolute
encoder position during rotation. The index pulse has a duration of a track po-
sition pulse. We recommend to always have the latch process performed in the
same rotational direction.
Input
A, B
C
LATCH
GATE
REF
Screen (Shield)
+24V
0V
Output
N1, N2
Function
Quadrature input, 24 V, single ended
Increment pulse signal channel A or B of the Incremental Encoder
Zero reference input, 24 V, single ended
Incremental encoder index pulse
Dependent on the operating mode, the counter reading is taken over
into the latch register or the counter showing the set value is
additionally loaded, if the input edge is positive.
LATCH input 24 V
Dependent on the operating mode, the counter reading is taken into the
latch register or the counter showing the set value is additionally
loaded, if the input edge is positive.
GATE input, 24 V
The counting process is locked if 24 V is applied to input GATE.
REF input, 24 V
During a reference run, the index pulse is only evaluated in conjunction
with an additional sensor signal (Ref).
Connection for the encoder line screen
The screen connection is directly routed to the carrier rail.
24 V supply voltage for the module
Ground for the 24 V supply voltage
Function
Cam output, 24 V, 0.5 A
"1" - Counter value is within of the defined range
"0" - Counter value is outside of the defined range
WAGO-I/O-SYSTEM 750
I/O Modules