Omron CJ1W-CLK21-V1, CVM1-CLK21, CS1W-RPT01, C200HW-CLK21, CQM1H-CLK21, CS1W-CLK21-V1 285

Troubleshooting Using Indicators						Section 9-1
		Indicators			Probable cause	Probable remedy
	RUN	ERC	ERH	INS
	Lit	---	---	Not lit	Terminating resistance is	Turn ON the terminating
					not set correctly.	resistance at the nodes at
						both ends of the Network
						and turn it OFF at all other
						nodes.
					Cables are not connected	Check the cable connec-
					correctly.	tions and reconnect cor-
						rectly.
					The node address is larger	Either reset the maximum
					than the maximum node	node address using the
					address set for the network	Controller Link Support
					parameters.	Software or reset the node
						address to below the maxi-
						mum.
					No other nodes exist.	Ensure that 2 or more
						nodes exist within the Net-
						work.
					No nodes have been set as	Refer to 8-1-2 Setting the
					polling nodes.	Polling and Polled Nodes
						and set at least one polling
						node. (Controller Link
						Units should normally be
						set as polling nodes.)
					The same operating level	Reset so that each operat-
					is set more than once for	ing level is used only once.
					the same PLC.
					The Bus Connection Unit	Tighten the mounting
					has become loose.	screws on the Bus Con-
						nection Unit (C200HX/HG/
						HE PLCs only).
					The set baud rate is differ-	Refer to SECTION 4 Prep-
					ent to other nodes.	arations for Communica-
						tions and set all nodes on
						the network to the same
						baud rate.
Troubleshooting with LNK and M/A Indicators
Data Link Cannot be	The following table describes the LNK and M/A indicators at the startup node
Started	and their use in troubleshooting when a data link cannot be started.

Starting a data link depends on the Controller Link Unit operating normally and participating in the Network. Refer to Troubleshooting with RUN, ERC, ERH and INS Indicators earlier in this section and check Unit operation before using the following table.

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