GE GFK-1004B Troubleshooting When the Status OK LED is on, Troubleshooting with Online LED OFF

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Count - The Count column contains a repetition count for the event. If events which are identical occur regularly, they might otherwise flood the log with useless entries. Instead of recording each repeated event in detail, the log simply keeps the time of the latest event and a count of the number of repetitions of the repeated event. Log entries are retained on restart and reloads of the Ethernet Interface.

Entry - The Entry columns contain detailed information about the event and is subdivided into 6 entries, Entry 1 - Entry 6.

Troubleshooting When the STATUS OK LED is ON

Sometimes problems can occur even when the STATUS OK LED is ON, indicating normal operation. In this case, follow the troubleshooting procedure below.

Table 6-7. Troubleshooting with ONLINE LED OFF

LED Indicators	Possible Cause and Resolution
The ONLINE	This indicates that an attempt to send a frame resulted in a local fault indica-
LED is OFF	tion. This usually results from a hardware problem. If this occurs follow the
	procedurebelow.
	- Check to be sure the LAN ONLINE Soft Switch is set to ªYESº. By
	issuing the Soft Switch Station Manager command checking the
	Network Online field.
	- Check to be sure the drop cable is securely fastened to the controller
	board connector and to the transceiver.
	- Make sure the transceiver is securely fastened to the Ethernet
	network trunk cable.
	- Issue a TALLY L Station Manager. If either the MacErr or the
	SQEErr tally is non-zero, the local station may be experiencingan
	unstable network. In this case follow the procedure below.
	If this station is the only one experiencingproblems:
	- Verify that the SQE jumper is enabled on the transceiver connected
	to the Ethernet Interface.
	- Re-tighten all transceiver cable connections.
	- Make sure the slide lock on the Ethernet Controller board is locked.
	- Replace the transceiver cable with a known good cable.
	- Verify that the Series 90-70 PLC power supply is properly grounded.
	- Make sure that the Ethernet Controller board ground safety wire is
	securelyfastened.
	- Replace the transceiver with a known good transceiver.
	If all stations are experiencing the problem, the cable plant is probably
	at fault.
	- Recertify the cable plant.
	If the problem still exists, call GE FanucAutomationforsupport.

GFK-1004B Chapter 6 Troubleshooting 6-9