750-404/000-001 [Up Counter / Enable Input] • 29
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.3.6 Process Image
Using the I/O module 750-404/000-001, a 5 byte input and output process
image can be transferred to the fieldbus coupler / controller via two logical
channels.
The transfer of the setting counter value in binary format is made via 4 output
bytes (D0 ... D3) and the transfer of the counter reading in binary format is
made via 4 input bytes (D0 ... D3). The control byte C0 serves for setting and
locking the counter and for setting the outputs. The status byte S0 shows the
status of the counter and the inputs and outputs.
Attention
The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/-controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.
Input data
Output data
S0
Status byte 0
C0
Control byte 0
D0
Counter value byte 0 (LSB)
D0
Set value byte 0 (LSB)
D1
Counter value byte 1
D1
Set value byte 1
D2
Counter value byte 2
D2
Set value byte 2
D3
Counter value byte 3 (MSB)
D3
Set value byte 3 (MSB)
Control byte
B7
B6
B5
B4
B3
B2
B1
B0
0 0 Set
counter
Lock
counter
Set
output
DO 2
Set
output
DO 1
0 0
0
This constant must be set to zero.
Status byte 0
B7
B6
B5
B4
B3
B2
B1
B0
X X
Counter
is set
Counter
is
blocked
actual
signal at
output
DO 2
actual
signal at
output
DO 1
actual
signal at
input
U/D
actual
signal at
input
CLOCK
X
This value is not evaluated.