Rockwell Automation 1756-XXXX ControlLogix Analog I/O Modules User Manual
Page 163

Publication 1756-UM009C-EN-P - December 2010
163
Non-isolated Analog Output Modules (1756-OF4 and 1756-OF8) Chapter 7
1756-OF4 and 1756-OF8
Fault Reporting in
Integer Mode
The illustration provides an overview of the fault reporting process in
integer mode.
15
14
13
12
11
5
4
3
2
1
0
15 = AnalogGroupFault
12 = Calibrating
11 = Cal Fault
14 and 13 are not used by
1756-OF4 or 1756-OF8
7 = Ch7Fault
6 = Ch6fault
5 = Ch5Fault
4 = Ch4Fault
Output in Hold conditions
(even numbered bits) must
be monitored here.
5
4
9
8
7
6
15
14
13
12
11
10
15 = Ch0OpenWire
14 = Ch0InHold
13 = Ch1OpenWire
12 = Ch1InHold
11 = Ch2OpenWire
10 = Ch2InHold
9 = Ch3OpenWire
8 = Ch3InHold
IMPORTANT: Bits 0…7 not used on 1756-OF4
If set, any bit in the Channel Fault word, also sets
the Analog Group Fault in the Module Fault word.
When the module is calibrating, all
bits in the Channel Fault word are set.
7
6
3
2
1
0
7 = Ch4OpenWire
6 = Ch4InHold
5 = Ch5OpenWire
4 = Ch5InHold
3 = Ch6OpenWire
2 = Ch6InHold
1 = Ch7OpenWire
0 = Ch7InHold
Open Wire conditions
(odd numbered bits) set
the appropriate bits in the
Channel fault Word.
Module Fault Word
(described on
Channel Fault Word
(described on
Channel Status Words
(described on
3 = Ch3Fault
2 = Ch2Fault
1 = Ch1Fault
0 = Ch0Fault
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