6

Table 6-8. Troubleshooting with ONLINE LED ON

LED Indicators

Possible Cause and Resolution

The ONLINE LED

There are several possible causes if a station cannot transfer data on the network.

is ON, but there is

These causes are described below with the appropriate action to be taken.

no network activity.

 

 

PLC Access Problem

 

 

To verify that the Ethernet Interface can access the PLC, issue successive

 

 

TALLY C Station Manager commands. If the PlcSweeptally is not increasing,

 

there are no windows being provided by the PLC.

 

- If any of the tallies PlcAbt,MyAbt, or Timeoutare 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 bponlineto ªYESº.

 

- 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

Systemevents.

8

PLC driver events.

b

Service Agent events.

c

LLC events.

11

IP events

12

TCP events

16

ARPevents

18

ICMP events

1b

SRTP Server events

1c

Channel API events

6-10

TCP/IP Ethernet Communications User's Manual ± January 1996

GFK-1004B

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GE GFK-1004B Exception Log Event Error Codes, Troubleshooting with Online LED on, Exception Log Event Definitions