Rockwell Automation Publication 1769-IN088A-EN-P - February 2011 125
I/O Memory Mapping Chapter 3
Program to Fault Enable Bit (PFE)
Word 0, bit 0, allows the selection of which data value, the program or fault value,
to apply to the output if a system in Program mode undergoes a system fault,
resulting a change to Fault mode.
Module Default Condition
The modules default condition is all zeros, programming the conditions shown.
1769-OB32T
The following I/O memory mapping lets you configure the 1769-OB32T
module.
Input Data File
For each module, slot x, input data file words 0 and 1 contain the state of the
module’s output data (output data echo) file words 0 and 1. 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
Value Applied Bit Setting
Program 0
Fault 1
Word or Bit Affected Condition Applied
Word 0, Bit 0: Program-to-Fault Enable Program Value
Word 1: Program State User-defined Safe State
Word 2: Program Value Off
Word 3: Fault State User-defined Safe State
Word 4: Fault Value Off
Word
Bit Position
1514131211109876543210
0r
(1)
(1) r = read.
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1rrrrrrrrrrrrrrrr
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