Rockwell Automation GMLC Reference Manual - Manual (Page 585)

Publication GMLC-5.2 - November 1999
548 Fault Variables
• Execute a Reset CNET Fault block, set to Type Card, as a Direct
Command from the Select Direct Command Window on the Online
Toolbar.
Executing a Reset CNET Fault block, set to Type Card, will reinitialize
the plug card and reset the variables CNET_fault_code and CNET_status
to 0.
If executing a Reset CNET Fault block (as described above) fails to clear
this fault, the plug card is defective and must be either repaired or
replaced.
This fault condition does not appear as an independent fault variable in
either the Tag Window or the Expression Builder.
Media Fault
A CNET Media fault (CNET_fault_code = 3) indicates:
• a wiring problem. Examples of causes of this fault include: an
unplugged cable, a broken cable, a cable without a terminator, etc.
This fault can occur during either CNET initialization or during
diagram execution; or
• no other network nodes are presently configured for ControlNet
communications.
When CNET_fault_code = 3, Global_fault = 16, CNET_fault = 1,
CNET_status = 3 and the affected CNET plug card LED is flashing red.
If a cable is connected to the network access port (NAP) of the CNET
plug card, the state of the LEDs is meaningless.
To clear this fault, either:
• Recycle power to the CNET plug card, or