
348
Description
Intermittent communications on IONet1 - Packet loss exceeded [ ]
Possible Cause
•
Power cycled on I/O producer (controller or I/O pack or module)
•
IONet malfunction
•
I/O message corruption
•
Communication errors occurred on more than 5% of data transmissions on IONet1
Solution
•
Check for evidence of pack restart (diagnostic alarms, error logs).
•
Faulty Ethernet cable from pack to network switch and/or from switch to controller. Replace cable(s).
•
Replace the I/O pack or module.
•
Faulty network switch; place the I/O pack or module's Ethernet cable into an empty port. If problem persists, replace the
network switch.
349
Description
Intermittent communications on IONet2 - Packet loss exceeded [ ]
Possible Cause
•
Power cycled on I/O producer (controller or I/O pack or module)
•
IONet malfunction
•
I/O message corruption
•
Communication errors occurred on more than 5% of data transmissions on IONet2
Solution
•
Check for evidence of pack restart (diagnostic alarms, error logs).
•
Faulty Ethernet cable from pack to network switch and/or from switch to controller. Replace cable(s).
•
Replace the I/O pack or module.
•
Faulty network switch; place the I/O pack or module's Ethernet cable into an empty port. If problem persists, replace the
network switch.
350
Description
Intermittent communications on IONet3 - Packet loss exceeded [ ]
Possible Cause
•
Power cycled on I/O producer (controller or I/O pack or module)
•
IONet malfunction
•
I/O message corruption
•
Communication errors occurred on more than 5% of data transmissions on IONet3
Solution
•
Check for evidence of pack restart (diagnostic alarms, error logs).
•
Faulty Ethernet cable from pack to network switch and/or from switch to controller. Replace cable(s).
•
Replace the I/O pack or module.
•
Faulty network switch; place the I/O pack or module's Ethernet cable into an empty port. If problem persists, replace the
network switch.
Common I/O Module Functionality
GEH-6855_Vol_II System Guide 465
Public Information