Rockwell Automation 1756-XXXX ControlLogix Analog I/O Modules - Manual (Page 146)

146 Publication 1756-UM009C-EN-P - December 2010
Chapter 6 Temperature-measuring Analog Modules (1756-IR6I, 1756-IT6I, and 1756-IT6I2)
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 are found in the
Module Fault Word:
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.
Module Fault Word Tags
Tag Description
Analog Group
Fault This bit is set when any bits in the Channel Fault word are set. Its tag
name is AnalogGroupFault.
Input Group Fault This bit is set when any bits in the Channel Fault word are set. Its tag
name is InputGroup.
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.
Cold Junction
Underrange –
1756-IT6I only This bit is set when the ambient temperature around the cold junction
sensor is below 0
o
C. Its tag name is CJUnderrange.
Cold Junction
Overrange –
1756-IT6I only This bit is set when the ambient temperature around the cold junction
sensor is above 86
o
C. Its tag name is CJOverrange.
Channel Fault Word Conditions
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. “003F” for all bits.
A communication fault occurred
between the module and its
owner-controller. “FFFF” for all bits.