Rockwell Automation 1756-CNB ControlLogix ControlNet Bridge Module Installation Instructions - Manual (Page 26)

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Publication 1756-IN571B-EN-P - April 2001
ControlNet Channel Status Indicators
The ControlNet channel status indicators appear in one of the
following states:
• steady - indicator is on continuously in the defined state.
• alternating - the two indicators alternate between the two
defined states at the same time (applies to both indicators
viewed together). The two indicators are always in opposite
states, out of phase.
• flashing - the indicator alternates between the two defined
states (applies to each indicator viewed independent of the
other). If both indicators are flashing, they must flash together,
in phase.
Green or
Off SO_1 Old primary switchover phase 1
in progress. If the display shows any message
for more than three seconds, then
the CNB module failed during
transition from one redundancy
phase to another. Replace one or
both redundancy modules.
SO_2 Old primary switchover phase 2
in progress.
SO_3 Old primary switchover phase 3
in progress.
SN_1 New primary switchover phase 1
in progress.
SN_2 New primary switchover phase 2
in progress.
SN_3 New primary switchover phase 3
in progress.
?Cpt CNB has not determined if it is
compatible.
!Cpt CNB has determined that it is
not compatible. Replace the CNB module with
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, the display scrolls: “FAULT: ADDRESS SWITCHES =
99, ILLEGAL IN REDUNDANT SYSTEM”
Diagnostics
LED Display
Cause Action
OK