Rockwell Automation 1769-XXXX Compact I/O Modules - Manual (Page 128)

128 Rockwell Automation Publication 1769-IN088A-EN-P - February 2011
Chapter 3 I/O Memory Mapping
Fault Value Word
The fault value word, word 4, is used to program the fault state value (0=Off,
1=On). Each output is individually configurable for on or off.
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 module’s default condition is all zeros, programming the conditions shown.
1769-OF2 The following I/O memory mapping lets you configure the 1769-OF2 module.
Input Data File
For each module, slot x, input data file words 2 and 3 contain the state of the
module’s output data (output data echo) file words 0 and 1. During normal
operation, these input words represent the analog values 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 Bit Setting
Off 0
On 1
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