Omron CVM1-CLK21, CS1W-RPT01, CJ1W-CLK21-V1, C200HW-CLK21, CQM1H-CLK21, CS1W-CLK21-V1 157

Checking Data Link Status Section 5-4

When 8-bit Format is Specified (i.e., when using a C200HX/HG/HE, CVM1, CV-series, or CQM1H-series PLC or when using a CS/CJ-series PLC with the data link status storage format specification in the DM Parameter Area set to 8-bit format)

(See note 1.)

	15		8 7	0
First status word + 0		Node 2	Node 1
First status word + 1		Node 4	Node 3
First status word + 2		Node 6	Node 5
First status word + 3		Node 8	Node 7
		to	to
First status word + 14		Node 30	Node 29
First status word + 15		Node 32	Node 31
First status word + 16		Node 34	Node 33
First status word + 17		Node 36	Node 35
		to	to
First status word + 27		Node 56	Node 55
First status word + 28		Node 58	Node 57
First status word + 29		Node 60	Node 59
First status word + 30		Node 62	Node 61

15 14 13 12 11 10 9 8

7 6 5 4 3 2 1 0

PLC status (See note 2.)

0:Inactive (user program not running)

1:Active (user program running)

PLC's CPU Unit error (See note 3.)

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 (See note 4.)

0:Normal

1:Error

Error: Offset exceeds number of send words.

Insufficient (short) receive area (See note 5.)

0:Sufficient

1:Insufficient

Insufficient: Receive area is smaller than send area. Excess data is truncated; other data is received.

Remaining receive area (See note 6.)

0:Not remaining

1:Remaining

Remaining: Receive area is larger than send area. Data is received and remaining words are cleared.

Note 1. When the default setting is used for the data link status storage destination, 16 words are determined within the status area according to the unit num- ber setting. When the 8-bit format is specified, therefore, the data that is reflected will be limited to node addresses 1 to 32.

When data link status is required for node addresses 33 or larger, do not use the default setting, i.e., specify the first word of the status storage area. If this is done when an 8-bit format is specified, 31 words will be used as the status storage area.

2.Always 1 for the Controller Link Support Board.

3.Always 0 for the Controller Link Support Board.

4.Even if an offset error occurs, the data link will operate and the node will participate in the data links. In the node where the offset error occurred, however, all receive area words will be cleared to 0.

157