Manual

112 Publication 1756-UM009C-EN-P - December 2010
Chapter 5 Sourcing Current Loop Input Module (1756-IF6CIS) and Isolated Analog Voltage/Current Input Module (1756-IF6I)
Fault Reporting in Floating
Point Mode
The illustration provides an overview of the fault reporting process in floating
point mode.
Module Fault Word
(described on
page 113
Channel Fault Word
(described on
page 113 )
Channel Status Words
(one for each channel–
described on
page 114 )
15 14 13 12 11
5 43210
5 4321076
15 = AnalogGroupFault
14 = InGroupFault
12 = Calibrating
11 = Cal Fault
13 is not used by the
1756-IF6CIS or 1756-IF6I
5 = Ch5Fault
4 = Ch4Fault
3 = Ch3Fault
2 = Ch2Fault
1 = Ch1Fault
0 = Ch0Fault
7 = ChxCalFault
6 = ChxUnderrange
5 = ChxOverrange
4 = ChxRateAlarm
If set, any bit in the Channel Fault word, also sets the Analog Group
Fault and Input Group Fault in the Module Fault word.
A channel
calibration fault
sets the calibration
fault in the Module
Fault word.
Alarm bits in the Channel Status word do not
set additional bits at any higher level.
You must monitor these conditions here.
3 = ChxLAlarm
2 = ChxHAlarm
1 = ChxLLAlarm
0 = ChxHHAlarm
An underrange, overrange condition
sets appropriate Channel Fault bits.
When the module is calibrating, all bits in
the Channel Fault word are set.
41345