98 Rockwell Automation Publication 1769-IN088A-EN-P - February 2011
Chapter 3 I/O Memory Mapping
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. For the 1769-IQ6XOW4,
bits 4 to 15 are not used.
Configuration File
The read/writable configuration data file allows the setup of the hold last state
and user-defined safe state conditions.
The manipulation of the bits from this file is normally done with programming
software, such as RSLogix 500, RSLogix 5000, or RSNetWorx for DeviceNet,
during initial configuration of the system. In that case, graphical screens are
provided via the programmer to simplify configuration. However, some systems,
like the 1769-ADN DeviceNet adapter, also allow the bits to be altered as part of
the control program using communication rungs. In that case, it is necessary to
understand the bit arrangment.
Word
Bit Position
1514131211109876543210
0
0 0 0 0 0 0 0 0 0 0r
(1)
(1) r = read.
rrrrr
1 0 0 0 0 0 0 0 0 0 0 0 0rrrr
Input data file 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.
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
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 0w
(1)
(1) w = write.
www
Word
Bit Position
1514131211109876543210
0000000000000000PFE
1 Program State for Output Array Word 0
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