Unexpected Ethernet Restart Or Runtime Errors - GE VersaMax PLC User Manual

270 GFK-1503E
For public disclosure
13.6.2 Unexpected Ethernet Restart or Runtime
Errors
Sustained heavy EGD and/or SRTP operation can exceed the data transfer and processing
capacity of the CPUE05. This can result in missed EGD exchanges, unexpected automatic
restarts of the Ethernet interface within the CPUE05, or runtime fatal errors at the
Ethernet interface.
Restart errors are indicated in the PLC Fault Table as one or more of the following:
Loss of daughterboard (no exception Event)
Reset of daughterboard (no exception Event)
LAN system-software fault; restarted LAN I/F with exception Event = 3, Entry 2 = 1,
Entry 3 = 5f0fH
After any of the above errors, the Ethernet interface restarts itself automatically without
manual intervention.
The above Ethernet restarts may be accompanied by one or more of the following in the
PLC Fault Table:
Backplane communications with PC fault; lost request (no exception event)
LAN system-software fault; resuming
with exception Event = 28, Entry 2 = 1, SCode = 95255037H
Runtime errors suspend normal operation and a blink fatal error code in amber at the
STAT LED. To recover, manually restart the Ethernet interface. Runtime error codes 31
and 33 have been observed under heavy load. Refer to the section,
LEDs earlier in this chapter for descriptions of runtime diagnostic fatal error codes.
All Ethernet Global Data (EGD) exchanges default to status code 18 (0012H) during a
loss or reset of the Ethernet interface. EGD operation will resume after the restart is
complete.
These restart and runtime errors occur when the CPUE05 cannot process the attempted
volume of EGD and/or SRTP requests. As these errors have been observed only when the
CPUE05 is connected to a repeater-type network hub, the primary remedy is to replace
the repeater-type hub with a switching-type network hub. A secondary remedy is to
reduce the number, size, or frequency of the EGD exchanges and/or transfers over SRTP
connections.
Checking the Ethernet
VersaMax PLC User Manual