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6
6-10 TCP/IP Ethernet Communications User’s Manual – January 1996
GFK-1004B
Table 6-8. Troubleshooting with ONLINE LED ON
LED Indicators Possible Cause and Resolution
The ONLINE LED
is ON, but there is
no network activity.
There are several possible causes if a station cannot transfer data on the network.
These causes are described below with the appropriate action to be taken.
PLC Access Problem
To verify that the Ethernet Interface can access the PLC, issue successive
TALLY C Station Manager commands. If the PlcSweep tally is not increasing,
there are no windows being provided by the PLC.
- If any of the tallies PlcAbt, MyAbt, or Timeout are incrementing,
there may be a hardware problem with the Series 90-70 PLC backplane
interface. Check the PLC Fault Table for entries for the Ethernet
Interface.
- Make sure to set the Soft Switch parameter bponline to “YES”.
- Replace the digital controller board with a known good board.
Exception Log Event Error Codes
The error codes below appear in the Event column of a log event. To view the log, issue
the LOG command from the Station Manager.
Table 6-9. Exception Log Event Definitions
Log Event Cause
1 Powerup. A log entry of this event will appear every
time the Ethernet Interface is Restarted or powered
up.
2 System events.
8 PLC driver events.
b Service Agent events.
c LLC events.
11 IP events
12 TCP events
16 ARP events
18 ICMP events
1b SRTP Server events
1c Channel API events