Rockwell Automation Publication CNET-IN005A-EN-P - May 2011 45
1756 ControlNet Status Indicators Appendix A
Steady green or off SO_1
(2)
Old primary switchover phase 1 is in progress.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
SO_2
(2)
Old primary switchover phase 2 is in progress.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
SO_3
(2)
Old primary switchover phase 3 is in progress.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
SN_1
(2)
New primary switchover phase 1 is in progress.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
SN_2
(2)
New primary switchover phase 2 is in progress.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
SN_3
(2)
New primary switchover phase 3 is in progress.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
?Cpt
(2)
The 1756-CNB/E module has not determined if it is compatible.
If the display shows this message for more than 3 seconds, then the 1756-CNB/E
module failed during transition from one redundancy phase to another. Replace one
or both redundancy modules.
!Cpt
(2)
The 1756-CNB/E module has determined that it is not compatible.
Replace the 1756-CNB/E module with one of the correct type and revision.
(1) If switches are set to 00, the display scrolls ‘FAULT: ADDRESS SWITCHES = 00, ILLEGAL’. If switches are set to 99 in a redundant chassis pair, the display scrolls ‘FAULT:
ADDRESS SWITCHES = 99, ILLEGAL IN REDUNDANT SYSTEM’.
(2) ControlLogix redundancy systems only.
Table 4 - OK Status Indicator and Display
Status Display Description
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