Omron CS1W-CLK21-V1, CVM1-CLK21 Checking Data Link Status, LED Indicators, Data Link Status Area

Checking Data Link Status Section 5-4

Issuing the FINS Command from CVM1, CV-series, CS/CJ-series, and CQM1H-series PLCs

CVM1, CV, CS/CJ, or CQM1H

FINS command:

RUN/STOP

Node in data links

Data links can be stopped by sending the FINS command “STOP.” The node to which the FINS command is issued must be participating in the data link.

5-4 Checking Data Link Status

There are two methods for checking the status of active data links:

•Check the LED indicators on the front of the Units.

•Check the data link status area.

5-4-1 LED Indicators

Check the LINK and M/A indicators on the front of the unit.

CS-series PLCs	CJ-series PLCs			C200HX/HG/HE PLCs CVM1 and CV-series PLCs CQM1H-series PLCs
CLK21-V1	CLK21-V1	INS	SD		CLK21		CLK21
	RUN ERC
	TER ERH M/A	LNK	RD				RUN	TER
							ERC	ERH
					RUN	TER	INS	M/A
							SD RD	LNK
					ERC	ERH
						M/A
					INS	LNK
					SD	RD

Make sure that the LNK indicator is ON at nodes participating in the active data links.

Name	Color	Status		Contents
LNK	Yellow	ON	Participating in data links.
(data link)
		Flashing	Data link table setting error
		OFF	Not in data links or data links are inactive.
M/A	Yellow	ON	Manual	Note: This indicator will
(data link				always be OFF when the
		OFF	Automatic
mode)				data links are not active.

The LNK indicator will be lit at all node participating in the data links as long as operation is normal. The data link mode (manual/automatic) can be checked using the M/A indicator. See 9-1 Troubleshooting Using Indicators for details.

5-4-2 Data Link Status Area

The data link status area can be used to check for errors when data link does not operate normally even though no abnormality has been detected by the PLC’s CPU Unit or the Controller Link Unit. The data link status area contains the data link status information shown below.

The number of words used for data link status and the information that is reflected depends on the setting (8-bit or 4-bit format) for the data link status storage format specification in the DM Parameters Area, as shown in the fol- lowing diagram.

See 9-2 Status Area and Troubleshooting for troubleshooting procedures and see Data Link Status Storage Format (CS/CJ Series Only) for details on set-

ting the data link status storage format in the DM Parameters Area when using CS- and CJ-series PLCs.

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