
327
Description
Communication lost from S processor
Possible Cause
•
IONet or hardware malfunction
•
R or T processor in redundant system lost communication with S processor
•
Missing cable from the controller to the Unit Data Highway (UDH) network switch
Solution
•
Go online with the S processor. Verify that the processor is in the Controlling state. If not communicating or in
Controlling state, restart the processor.
•
Check for disconnected IONet cables or malfunctioning switches.
•
Rebuild and download the application.
•
Check for a defective Ethernet cable to network switch.
•
Check for a defective network switch:
−
Place the Ethernet cable into empty port.
−
If the problem persists, replace the network switch.
328
Description
Communication lost from T processor
Possible Cause
•
IONet or hardware malfunction
•
R or S processor in redundant system lost communication with T processor
•
Missing cable from the controller to the Unit Data Highway (UDH) network switch
Solution
•
Go online with the T processor. Verify that the processor is in the Controlling state. If not communicating or in
Controlling state, restart the processor.
•
Check for disconnected IONet cables or malfunctioning switches.
•
Rebuild and download the application.
•
Check for a bad Ethernet cable to network switch.
•
Check for a bad network switch:
−
Place the Ethernet cable into empty port.
−
If the problem persists, replace the network switch.
50
GEH-6855_Vol_II
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
Public Information