168 Rockwell Automation Publication 1769-IN088A-EN-P - February 2011
Chapter 3 I/O Memory Mapping
Output Data File
For each module, slot x, words 0 and 1 in the output data file contain the control
program’s directed state of the discrete output points.
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 arrangement.
Word
Bit Position
1514131211109876543210
0w
(1)
(1) w=write
wwwwwwwwwwwwwww
1wwwwwwwwwwwwwwww
Word
Bit Position
1514131211109876543210
0000000000000000PFE
10000000000000000
2 Program State for Output Array Word 0
3 Program State for Output Array Word 1
4 Program Value for Output Array Word 0
5 Program Value for Output Array Word 1
6 Fault State for Output Array Word 0
7 Fault State for Output Array Word 1
8 Fault Value for Output Array Word 0
9 Fault Value for Output Array Word 1
100000000000000000
110000000000000000
120000000000000000
130000000000000000
140000000000000000
150000000000000000
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