114 • I/O modules
Counter modules 750-404/000-004
Modular I/O System
ETHERNET TCP/IP
4.2.1.1.7 Variation
Up/Down Counter with switching outputs
750-404/000-004
Technical description
The counter module also can be ordered as Counter with switching outputs
with item number 750-404/000-004.
The counter module 750-404/000-004 begins processing with pulses at the
CLOCK input. The changes from 0 V to 24 V are counted.
The counter counts up if the input U/D is set at 24 V. With an open circuit in-
put or 0 V the counter counts backwards.
The terminals O1 and O2 work as binary outputs. Each output can be activated
via specific bits in the CONTROL byte.
The high "on"states of the input and output channels are each indicated by a
LED.
The counter module can operate with all WAGO-I/O-SYSTEM bus-couplers
(except for the economy type).
Organization of the input and output data:
The control byte has the following bits
Bit 7 it 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
x
Set
coun-
ter
Block
counter
Output
value at
output O2
Output
value at
output O1
Output O2 acti-
vated depending
of the counter
value
Output O1 acti-
vated depending
of the counter
value
The status byte has the following bits:
Bit 7 Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
x
x
Counter
is set
Counter
is blok-
ked
Actual
signal at
output O2
Actual
signal at
output O1
Positive signal at
input U/D,
counter counting
up
Actual signal at
input CLOCK
