Rockwell Automation 1769-XXXX Compact I/O Modules - Manual (Page 64)

64 Rockwell Automation Publication 1769-IN088A-EN-P - February 2011
Chapter 3 I/O Memory Mapping
• PMx = These bits provide Program (Idle) mode selection for analog
output channels 0 and 1.
Hold Last State (0)—When reset, this bit directs the module to hold the
analog output at the last converted value when the module transitions to
Program mode. This is the default condition.
User-Defined Safe State (1)—When this bit is set and the module
transitions to Program mode, the module converts the user-specified
integer value from the Channel
x Program Value Word (3 or 5) to the
appropriate analog output for the configured range as wired.
• FMx = These bits provide Fault mode selection for analog output channels
0 and 1.
Hold Last State (0)—When reset, this bit directs the module to hold the
analog output at the last converted value when the module transitions to
Fault mode. This is the default condition.
User-Defined Safe State (1)—When this bit is set and the module
transitions to Fault mode, the module converts the user-specified integer
value from the Channel
x Fault Value Word (2 or 4) to the appropriate
analog output for the configured range as wired.
• PFEx = The Program to Fault Enable bit determines which data value,
Program (PFEx = 0) or Fault (PFEx = 1), is applied to the output if the
module undergoes a fault condition while in the Program mode, resulting
in a change to Fault mode.
• Channel x Program (Idle) Value
Words 3 and 5 allow you to enter the integer values that output Channel 0
(Word 3) and output Channel 1 (Word 5) should assume when the system
transitions to the Program mode. The value must be in increments of 128,
such as 0, 128, or 256, for proper operation. If the value entered is outside
the acceptable increment or range, the module generates a configuration
error for that channel. The module default is zero.
• Channel x Fault Value
Words 2 and 4 allow you to enter the integer values that output Channel 0
(Word 2) and output Channel 1 (Word 4) should assume when the system
transitions to the Fault mode. The value must be in increments of 128,
such as 0, 128, or 256, for proper operation. If the value entered is outside
the acceptable increment or range, the module generates a configuration
error for that channel. The module default is zero.
IMPORTANT PMx, FMx, PFEx, Channel x Program (Idle) Value and Channel x
Fault Value functions are not supported by all controllers. Refer to
your controller’s user manual for details.