Control- / Status Byte 750-404/000-002 - WAGO 750-404 Manual

2.1.2.7.2 Control- / Status byte 750-404/000-002

The control byte C0 serves for starting the periodic counter pulse
measurement and for setting the outputs. The status byte S0 shows the status
of the counter and the inputs and outputs.
0
X
The counter begins processing with pulses at the CLOCK input and counts the
pulses in a special time span. The time span is given as 10 s.
The state of the counter is stored in the process image until the next period.
After the recording the counting starts again at 0.
The activation of the counting and the synchronization with the SPS is made
by a handshake in the control and status byte.
The end of the counting period and thus the new process data is signaled by a
toggle bit in the status byte.
WAGO-I/O-SYSTEM 750
I/O Modules
B7 B6 B5
0 0 Start of
the
periodic
counting
This constant must be set to zero.
B7 B6 B5
X X Counting
starting
This value is not evaluated.
750-404 [Up/Down Counter /100 kHz]
Control byte
B4 B3 B2
0 Set Set
output output
DO 2 DO 1
Status byte
B4 B3 B2
X actual actual
signal at signal at
output output
DO 2 DO 1
• 19
Process Image
B1 B0
0 0
B1 B0
actual Toggelbit
signal at for end of
input the
U/D record