GE GFK-1541B manual LED Pattern Where Stopped Possible Cause Corrective Actions

2

	LED Pattern	Where Stopped		Possible Cause		Corrective Actions
❍ MODULE OK OFF)		A	Fatal Hardware Error.		ƒ	Make sure the PLC has power.
❍	LAN ONLINE (OFF)				ƒ Examine PLC Fault Table for
						clues.*
❍	SERIAL ACTIVE (OFF)	Hardware
					ƒ	Recheck PLC Programmer
❍	STATUS (OFF)
		Failure
						configuration.
					ƒ Power off the PLC rack, inspect the
						Interface for loose components,
						reseat the Interface, and Restart.
					ƒ Try a different slot.
					ƒ If the problem persists, replace the
						Interface or PLC hardware.
✫ MODULE OK (Slowblink)		B	ƒ	Restart pushbutton until the	ƒ	Connect a PC Software Loader and
✫	LAN ONLINE (Slowblink)		ƒ	bottom LED turns ON.		load new software. See Appendix C.
				Station Manager LOAD	ƒ	Cycle power or press Restart
✫	SERIAL ACT. (Slowblink)	Software
				command issued.		pushbutton again for less than 5
✫	STATUS (Slowblink)
		Loader	ƒ
				Software corrupt.		seconds to restart the Interface and
All LEDs blink in unison.
						clear the load request.
✫ MODULE OK (Slowblink)		C	ƒ	Did not configure slot using	ƒ	Use configuration software to
❍	LAN ONLINE (OFF)			PLC Programmer.		configure the Interface then store
			ƒ New CPU with no			the configuration to the PLC CPU.
❍	SERIAL ACT. (OFF)	Waiting for
				configuration.	ƒ	Make sure Interface is in the correct
❍	Status (OFF)
		Configuration	ƒ
				CPU not communicating		slot on the in the PLC rack.
		from PLC		with Ethernet Interface	ƒ	Power cycle the PLC.
			ƒ (Condition can last a		ƒ	Clear faults and Restart Interface.
				maximum of 2 minutes.)
✫	MODULE OK (Slowblink)	D	Interface’s IP address has not		ƒ Use PLC Programmer configuration
						software to configure the Interface
●/✲/❍ LAN ONL. (ON/Traffic/OFF)			been configured or has been
❍	SER. ACT (OFF/Slowblink)	Waiting for IP	configured as 0.0.0.0.			with a non-zero IP address.
					ƒ Use a BOOTP server to provide
✫	STAT US (Slowblink)
		Address
						Interface with a non-zero IP
MODULE OK and STATUS blink in						Address.
unison.
✫ MODULE OK (Slowblink)		E	ƒ	Restart pushbutton until	ƒ	If you did not intend to enter
●/✲/❍	LAN ONL. (ON/Traffic/OFF)		ƒ	bottom two LEDs turn ON.		Maintenance, press the Restart
				Station Manager MAINT		pushbutton for less than 5 seconds.
✫	SERIAL ACT. (Slowblink)	Maintenance
				command issued.		This clears the Maintenance request.
●/❍ STATUS (ON/OFF)
			ƒ Internal System Error when		ƒ	Examine PLC Fault Table for
MODULE OK and SERIAL ACTIVE				Interface was Operational		clues.*
				caused a restart and	ƒ	If you need to use the Station
blink in unison.
				entrance into Maintenance.		Manager to troubleshoot a problem,
						see GFK-1186, TCP/IP Ethernet
						Communications for the Series 90
						PLC Station Manager Manual.
●	MODULE OK (ON)	F	If the LAN ONLINE LED is		ƒ
					ƒ
●/✲/❍ LAN ONL. (ON/Traffic/OFF)			OFF, the problem may be:			Connect cable and transceiver
❍	SERIAL ACTIVE (OFF)	Operational	ƒ	Network cable not	ƒ	properly. Replace transceiver.
●/❍ STATUS (ON/OFF)				connected or transceiver not		Terminate network cable properly.
				connected to Interface or	ƒ	Set SQE ON on transceiver in
				bad transceiver.		accord with manufacturer’s
			ƒ	Network cable not	ƒ	instructions.
				terminated properly.		Examine PLC Fault Table to find
			ƒ SQE not enabled on			out why the STATUS LED is OFF.
				transceiver.		*
			If the STATUS LED is OFF, an
			exception condition has
			occurred.

GFK-1541B Chapter 2 Installation 2-53