Omron CQM1H-CLK21, CVM1-CLK21, CS1W-RPT01 CVM1 and CV-series Controller Link Units, Stopped

Troubleshooting Using Indicators									Section 9-1
		Indicators				Probable cause			Probable remedy
		LNK	M/A
		Lit	---		Data link operating normally.				---
		Flashing	Lit		When manual setting is used,				Refer to 5-2-2 Manual Setting
					there is an error in the data link				and remake the data link table.
					table.
		Flashing	Not lit		When automatic setting is				Refer to 5-2-4 Automatic Set-
					used, the data link parameters				ting, reset the parameters for
					at the startup node are incor-				the startup node DM Area so
					rect for the local node (the				that the local node can partici-
					data link area is out of range				pate in the data link, and then
					for the local node.)				restart the data link.
					Automatic setting is used with				Use a Controller Link Unit that
					1:N allocations, but the device				supports automatic data link
					does not support this function.				creation with 1:N allocations.
									Refer to Automatic Setting on
									page 129 for details.
		Not lit	Lit		When manual setting is used,				Set data link tables for the
					there are no data link tables				local node.
					set for the local node.
		Not lit	Not lit		When automatic setting is				Stop the data links, remake
					used, the startup node is not				and set the parameters in the
					set to participate in the data				startup node’s DM Area, and
					links.				then restart the data link.
Data Link Cannot be
		Stopping the data link depends on the Controller Link Unit operating normally
Stopped		and participating		in the Network. Read the					above explanations before
		attempting to stop operation.
	Note	Stop the data link from the node at which the LNK indicator is lit (indicating
		active data links). Data links cannot be stopped from nodes which do not have
		active data links.
9-1-3	CVM1 and CV-series Controller Link Units
							CLK21
							RUN	TER
							ERC	ERH
								M/A
							INS	LNK
							SD	RD
						RUN:		Operating
						ERC:		Communications error
						INS:		Network participation
						LNK:		Data link
						M/A:		Data link mode

Troubleshooting with RUN, ERC, ERH and INS Indicators

The RUN, ERC, ERH and INS indicators can be used to check whether Con- troller Link Unit startup and Network participation are operating normally.

Note Be sure to turn off the power to the PLC before performing any of the follow- ing.

•Disconnecting the Unit or connectors.

•Securing Units or connectors.

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