Output data, Input data – Rockwell Automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter User Manual
Page 40
Publication 1769-UM001B-EN-P - October 2002
2-16 How Communication Takes Place and I/O Image Table Mapping
1769-IQ6XOW4 24V DC
Sink/Source Input AC/DC
Relay Output Module
(6 Point In, 4 Point Out)
Output Data
For each 1769-IQ6XOW4 module, output data word 0 contains the
control program’s directed state of the discrete output points. Bits 4 to
15 are not used.
Input Data
For each 1769-IQ6XOW4 module, input data word 0 contains the
current state of the field input points. Input data word 1 contains the
state of the module’s output data (output data echo). During normal
operation (controller in Run), these input bits represent the logic state
that the outputs are directed to by the control program. They are also
dependent upon the:
• Program Mode configuration (Hold Last or User-Defined Safe
State)
• Fault Mode configuration (Hold Last or User-Defined Safe State)
For the 1769-IQ6XOW4, input data word 0 bits 6 to 15 are not used.
Wo
rd
Bit Position
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
w
w
w
w
w = write
Wo
rd
Bit Position
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
real
inputs
0
0
0
0
0
0
0
0
0
0
0
r
r
r
r
r
r
1
0
0
0
0
0
0
0
0
0
0
0
0
r
r
r
r
output
data
echo
r = read
IMPORTANT
Input data word 1 reflects the output data echo of
the module, not necessarily the electrical state of the
output terminals. It does not reflect shorted or open
outputs.