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25
Diagnostics
LED
Display
Cause
Action
OK
INIT
BW
>MAX
Normal operation
Module is initializing.
Module is receiving too much
network traffic and connections
are timing out. The network
bandwidth has been exceeded.
None required
CMPT
Secondary CNB is compatible
with its partner.
Secondary CNB is disqualified
with no partner.
OK
Green
DSNP
PwDS
PwQg
PwQS
PwNS
Qfng
QS
SW
ERR
Flashing CNFG
Green
ERR
NET
ERR
None require (temporary
condition).
If this happens frequently, add
another 1756-CNB or -CNBR and
split the traffic between them.
None required.
Check corresponding slot of
primary chassis for type and
revision of module.
CNB is primary with a
Check the type and revision of the
disqualified secondary partner.
1756-CNB module.
CNB is primary with a qualifying Redundant system status. No
secondary partner.
action required.
CNB is primary with a qualified
secondary partner.
CNB is primary with no
Check corresponding slot of
secondary partner.
secondary chassis for correct
module.
Secondary CNB is qualifying.
Redundant system status. No
action required.
Secondary CNB is qualified.
Node address switch changed
after power-up.
ControlNet configuration error.
Network cabling error or no
other active nodes on network.
None required, but we recommend
that you either return switches to
their original settings or replace
the module, since this could
indicate a latent hardware
problem.
Recheck configuration.
Re-check your network cabling
and make sure another node on
the network is active (on line).
Publication 1756-IN571B-EN-P - April 2001