Fault reporting in floating point mode – Rockwell Automation 1756-XXXX ControlLogix Analog I/O Modules User Manual
Page 142
142
Publication 1756-UM009C-EN-P - December 2010
Chapter 6
Temperature-measuring Analog Modules (1756-IR6I, 1756-IT6I, and 1756-IT6I2)
Fault Reporting in Floating
Point Mode
The illustration offers an overview of the fault reporting process in floating
point mode.
Module Fault Word
(described on
Channel Fault Word
(described on
Channel Status Words
(one for each channel –
described on
15
14
13
12
11
10
9
8
5
4
3
2
1
0
5
4
3
2
1
0
7
6
15 = AnalogGroupFault
14 = InGroupFault
12 = Calibrating
11 = Cal Fault
9 = CJUnderrange (IT6I only)
8 = CJOverrange (IT6I only)
13 and 10 are not used by
1756-IR6I or 1756-IT6I
5 = Ch5Fault
4 = Ch4Fault
3 = Ch3Fault
2 = Ch2Fault
1 = Ch1Fault
0 = Ch0Fault
7 = ChxCalFault
6 = ChxUnderrange
5 = ChxOverrange
4 = ChxRateAlarm
41345
3 = ChxLAlarm
2 = ChxHAlarm
1 = ChxLLAlarm
0 = ChxHHAlarm
Cold Junction temperature underrange
and overrange conditions set bits 9 and 8
for 1756-IT6I only. You must monitor
these conditions here.
Any bit in the Channel Fault word, also sets the Analog
Group Fault and Input Group Fault in 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.
An underrange, overrange condition
sets appropriate Channel Fault bits
When the module is
calibrating, all bits in
the Channel Fault
word are set