Rockwell Automation Publication 1769-IN088A-EN-P - February 2011 165
I/O Memory Mapping Chapter 3
1769-OV16
The following I/O memory mapping lets you configure the 1769-OV16 module.
Output Module’s Input Data File
For each module, slot x, input data file word 0 contains the state of the module’s
output data (output data echo) file word 0. During normal operation, these input
bits represent the logic state that the outputs are directed to by the control
program. They are also dependent upon these configurations:
• Program Mode configuration, if supported by the controller
• Fault Mode configuration, if supported by the controller
Output Data File
For each module, slot x, word 0 in the output data file contains the control
program’s directed state of the discrete output points.
Word
Bit Position
1514131211109876543210
0r
(1)
(1) r = read.
rrrrrrrrrrrrrrr
The output module’s input data file 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.
It is important to use this input word if the controller adapter supports
the Program Mode or Fault Mode function, and if it is configured to use
them.
Word
Bit Position
1514131211109876543210
0w
(1)
(1) w = write.
wwwwwwwwwwwwwww
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