User manual

Publication CNET-UM001C-EN-P - November 2005
8-20 Troubleshoot Your ControlNet Communication Modules
Network Channel Status Indicator Interpretation
• 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 flash, they must flash together, in phase.
This table describes the 1788-CNC, 1788-CNCR, 1788-CNF and 1788-CNFR
network channel status indicators.
Table 8.9 1788-CNC, 1788-CNCR, 1788-CNF and 1788-CNFR Network Channel Status Indicators
IMPORTANT
When you connect the module to a ControlNet network
using only the NAP, the LEDs are meaningless.
If Both Channel Status
Indicators Are
It Means Take This Action
Off Channel disabled Program network for redundant media, if necessary.
Steady green Normal operation None
Flashing green/off Temporary network errors 1. Check media for broken cables, loose connectors,
missing terminators.
2. If condition persists, refer to the ControlNet Fiber
Media Planning and Installation Manual, publication
CNET-IN001 or the ControlNet Coax Media Planning
and Installation Manual, publication CNET-IN002.
Node is not configured to go online Make sure the network keeper is present and working and
the selected address is less or equal to the UMAX
(1)
.
(1)
UMAX is the highest node address on a ControlNet network that can transmit data.
Flashing red/off Media fault 1. Check media for broken cables, loose connectors,
missing terminators.
2. If condition persists, refer to the ControlNet Fiber
Media Planning and Installation Manual, publication
CNET-IN001 or the ControlNet Coax Media Planning
and Installation Manual, publication CNET-IN002.
No other nodes present on network Add other nodes to the network.
Flashing red/green Incorrect network configuration Reconfigure the ControlNet network so that UMAX is greater
than or equal to the card’s node address.
If Either Channel
Status Indicators Are
It Means Take This Action
Off You should check the MS indicators Check the MS indicators.
Steady red Faulted card 1. Cycle power.
2. If the fault persists, contact your Rockwell
Automation representative or distributor.
Alternating red/green The card is performing a self-test None
Alternating red/off Incorrect node configuration Check the card’s network address and other ControlNet
configuration parameters.