Omron CQM1H-CLK21, CVM1-CLK21 For details, refer to 9-1 Troubleshooting Using Indicators

Component Names and Functions						Section 3-1
Wired Unit Indicators
	Name	Color	Status		Meaning
	RUN	Green	Lit	Unit operating normally.
	(operating)
			Not lit	Unit error.
	TER	Yellow	Lit	Terminating resistance switch is ON.
	(terminating resis-
			Not lit	Terminating resistance switch is OFF.
	tance)
	ERC (communica-	Red	Lit	Communications error, node address
	tions error)			setting error (same address set twice), or
				hardware error.
			Not lit	Normal operation
	ERH	Red	Lit	PLC error, PLC interface error, EEPROM
	(PLC error)			error, unit number error, or I/O table not
				set
			Not lit	No error.
	INS	Yellow	Lit	Unit is participating (inserted) in the net-
	(network participa-			work.
	tion)
			Not lit	Unit is not participating (inserted) in the
				network.
	SD	Yellow	Lit	Data transmission.
	(send)
			Not lit	No data transmission.
	RD	Yellow	Lit	Data reception.
	(receive)
			Not lit	No data reception.
	M/A	Yellow	Lit	Manual		Note:
	(data link mode)			(see note)		M/A is always not lit
						when data links are not
			Not lit	Automatic
						active in the network.
	LNK	Yellow	Lit	Data links participating.
	(data link)
			Flashing	Error in data link table.
			Not lit	Not in a data link or data link inactive.

Note Even when the local node does not participate in the data link, the M/ A indicator will be lit if there are manually set data links active on the network.

For details, refer to 9-1 Troubleshooting Using Indicators.

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