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348
Description Intermittent Communications on IONet1 – Packet Loss Exceeded [ ]%
Possible Cause
•
Power cycled on I/O producer (controller or I/O module)
•
Faulty Ethernet cable from I/O pack to IONet switch and/or from IONet switch to controller.
•
Faulty IONet switch
•
I/O message corruption
•
Communication errors occurred on more than 5% of data transmissions on IONet1
Solution
•
Check for evidence of I/O pack restart (diagnostic alarms, error logs).
•
Replace Ethernet cable(s).
•
Replace the I/O pack.
•
Move the I/O pack's Ethernet cable into an empty IONet switch port. If problem persists, replace the IONet switch.
349
Description Intermittent Communications on IONet2 – Packet Loss Exceeded [ ]%
Possible Cause
•
Power cycled on I/O producer (controller or I/O module)
•
Faulty Ethernet cable from I/O pack to IONet switch and/or from IONet switch to controller.
•
Faulty IONet switch
•
I/O message corruption
•
Communication errors occurred on more than 5% of data transmissions on IONet2
Solution
•
Check for evidence of I/O pack restart (diagnostic alarms, error logs).
•
Replace Ethernet cable(s).
•
Replace the I/O pack.
•
Move the I/O pack's Ethernet cable into an empty IONet switch port. If problem persists, replace the IONet switch.
350
Description Intermittent Communications on IONet3 – Packet Loss Exceeded [ ]%
Possible Cause
•
Power cycled on I/O producer (controller or I/O module)
•
Faulty Ethernet cable from I/O pack to IONet switch and/or from IONet switch to controller.
•
Faulty IONet switch
•
I/O message corruption
•
Communication errors occurred on more than 5% of data transmissions on IONet3
Solution
•
Check for evidence of I/O pack restart (diagnostic alarms, error logs).
•
Replace Ethernet cable(s).
•
Replace the I/O pack.
•
Move the I/O pack's Ethernet cable into an empty IONet switch port. If problem persists, replace the IONet switch.
54
GEH-6855_Vol_II
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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