Rockwell Automation GMLC Reference Manual - Manual (Page 586)

Publication GMLC-5.2 - November 1999
549
• Find and fix the problem (either fix the wiring problem, or configure
other network nodes for ControlNet communications). Then, execute
a Reset CNET Fault block, set to type All Faults, as a Direct
Command from the Select Direct Command Window on the Online
Toolbar. Executing a Reset CNET Fault block, set to Type All Faults,
will reset the variables CNET_fault_code and CNET_status to 0.
This fault condition does not appear as an independent fault variable in
either the Tag Window or the Expression Builder.
Incorrect Network Configuration
A CNET Incorrect Network Configuration fault (CNET_fault_code = 2)
indicates problems with the network configuration. For example, if the
CNET network is configured for redundant media, a channel A cable
connected to a channel B port (or a channel B cable connected to a
channel A port) would cause this fault.
When CNET_fault_code = 2, Global_fault = 16, CNET_fault = 1,
CNET_status = 3 and the affected CNET plug card LED is flashing red
and green.
If a cable is connected to the network access port (NAP) of the CNET
plug card, the state of the LEDs is meaningless.
To handle or clear this fault:
• Find and fix the network configuration problem. Check that all
channel A cable connections are in fact connected only to channel A
ports on all network devices, and that all channel B cable connections
are in fact connected only to channel B ports.
Then either:
• Recycle power to the CNET plug card, or
• Execute a Reset CNET Fault block, set to type All Faults, as a Direct
Command from the Select Direct Command Window on the Online
Toolbar. Executing a Reset CNET Fault block, set to Type All Faults,
will reset the variables CNET_fault_code and CNET_status to 0.