Rockwell Automation 1756-XXXX ControlLogix Analog I/O Modules - Manual (Page 83)

Publication 1756-UM009C-EN-P - December 2010 83
Non-isolated Analog Voltage/Current Input Modules (1756-IF16, 1756-IF8) Chapter 4
1756-IF16 Module Fault Word Bits – Integer Mode
In integer mode, Module Fault word bits (bits 15…8) operate exactly as
described in floating point mode. The table lists tags that can be examined in
ladder logic to indicate when a fault has occurred:
1756-IF16 Channel Fault Word Bits – Integer Mode
In integer mode, Channel Fault word bits operate exactly as described in
floating point mode. The table lists the conditions that set
all Channel Fault
word bits:
Your logic can monitor the Channel Fault Word bit for a particular input to
determine the state of that point.
Tag Description
Analog Group
Fault This bit is set when any bits in the Channel Fault word are set. Its tag
name is AnalogGroupFault.
Calibrating This bit is set when any channel is being calibrated. When this bit is
set, all bits in the Channel Fault word are set. Its tag name is
Calibrating.
Calibration Fault This bit is set when any of the individual Channel Calibration Fault bits
are set. Its tag name is CalibrationFault.
This condition sets all Channel
Fault word bits And causes the module to display the
following in the Channel Fault word bits
A channel is being calibrated • ‘FFFF’ for single-ended operating mode
• ‘00FF’ for differential operating mode
• ‘000F’ for high-speed differential operating
mode
A communications fault occurred
between the module and its
owner-controller ‘FFFF’ for all bits, regardless of the application