Omron C200HW-CLK21 Status Area and Troubleshooting, Troubleshooting with the PWR Indicator

Status Area and Troubleshooting				Section 9-2
Troubleshooting with the PWR Indicator
indicator	Unit status	Possible error	Probable cause	Probable remedy
status
Lit	Power is being sup-	---	---	---
	plied normally
Not lit	Power supply error	Power supply	Cables are loose.	Check the cable connections.
		cables
			Cables are broken.	Check whether any of the cables
				are broken.
			Cable polarity is incorrect.	Check the cable connections.
		Power supply	Power supply voltage or current is	Check the power supply voltage,
			wrong.	and replace the power supply with
				a Power Supply Unit that will pro-
				vide a correct supply.
		Repeater Unit	The Repeater Unit is faulty.	Replace the Repeater Unit.
Troubleshooting with the T/R1 and T/R2 Indicators
indicator	Unit status	Possible error	Probable cause	Probable remedy
status
Lit or	The Unit is commu-	---	Unit operating normally.	---
flashing	nicating normally.
Not lit	Communications	Communica-	Cables are loose.	Check the cable connections.
	error (transmission	tions cables
			Cables are broken.	Check whether any of the cables
	signal error or no
				are broken.
	signal)
			Cable polarity is incorrect.	Check the cable connections.
			Noise interference in cables.	Check the wiring environment of
				the cables.
		Other nodes	The destination node does not	Check the destination Controller
			exist.	Link Unit status (power supply,
				cable connections).
			The destination node has an	Check the destination Controller
			error.	Link Unit status (baud rate setting,
				terminating resistance settings,
				statuses, error log, etc.).
		Repeater Unit	Terminating resistance is set	Check the terminating resistance
			incorrectly.	setting for the network.
			The baud rate setting is incorrect.	Check that the same baud rate is
				set for all nodes in the same net-
				work.
			Noise interference	Check the operating environment
				of the Unit.
			The Repeater Unit is faulty.	Replace the Repeater Unit.

9-2 Status Area and Troubleshooting

The status of the Unit and the communications status of the Controller Link Unit is recorded in the Status Area of the PLC. The cause of errors can be found by searching the Status Area. The Status Area can be read using a Pro- gramming Console, the SYSMAC Support Software, or the Controller Link Support Software.

This section explains the contents of the Status Area and tells how to trouble- shoot errors recorded there.

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