Omron CQM1H-CLK21, CVM1-CLK21, CS1W-RPT01, CJ1W-CLK21-V1 Bit Status and Error Processing

Status Area and Troubleshooting Section 9-2

Data Link Status: CIO 1500 + 25 ⋅ (Unit No.) + 7 to + 22

+7	Node	2	Node	1
+8	Node	4	Node	3
+9	Node	6	Node	5
+10	Node	8	Node	7
+11	Node	10	Node	9
+12	Node	12	Node	11
+13	Node	14	Node	13
+14	Node	16	Node	15
+15	Node	18	Node	17
+16	Node	20	Node	19
+17	Node	22	Node	21
+18	Node	24	Node	23
+19	Node	26	Node	25
+20	Node	28	Node	27
+21	Node	30	Node	29
+22	Node	32	Node	31

PLC status

0:Inactive (user program not running)

1:Active (user program running)

PLC's CPU Unit error

0:Normal

1:Error

Communications error (data link reception)

0:Normal

1:Error

Data link participation

0:Not in data link or data link inactive

1:In data link

		Offset error	Error: Offset exceeds
		0: Normal	number of send words.
		1: Error
	Insufficient (short) receive area Insufficient: Receive
	0: Sufficient		area is smaller than
	1: Insufficient		send area. Excess data
			is truncated; other data
			is received.
Remaining receive area			Remaining: Receive
0: Not remaining			area is larger than send
1: Remaining			area. Data is received
			and remaining words
			are cleared.

When the first data link status word is set to the default (0000) for either the manually set data link tables or automatically set data link tables (In the first data link status word parameter), the data link status is stored in the above area (CIO 1500 + 25 ⋅ (Unit No.) (+ 7 to +22)).

When a different area has been set for the first data link status word, the sta- tus is stored in the specified area. The status storage format is the same as the one shown in the above diagram.

Note Refer to 5-4 Checking Data Link Status for details on status flags.

Bit Status and Error Processing

Data Link Status

Bit status	Probable cause	Probable remedy
PLC’s CPU Unit error is 1:	A fatal PLC error, non-fatal	Refer to the PLC’s opera-
ON	PLC error, or a watchdog	tion manual and correct
	timer error has occurred.	the error. If the error occurs
		again, replace the PLC.
	The Unit is mounted to a	Refer to 1-2-4 Controller
	non-compatible PLC.	Link Unit Models and PLCs
		and mount onto the correct
		PLC.

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