Omron CS1W-CLK21-V1, CVM1-CLK21, CS1W-RPT01, CJ1W-CLK21-V1, C200HW-CLK21, CQM1H-CLK21 180

Introduction Section 6-1

sage service, it is advisable to prevent this situation from occurring by per- forming resend processing at the node where instructions are issued. With the SEND, RECV, and CMND instructions, resend processing is performed automatically once the number of retries has been set, so be sure to specify a number other than “0” for the number of retries.

CVM1 and CV-series PLCs CMND sends “n” bytes of command data beginning with S (the beginning word for storing command data at the source node) to node N. In return, “m” bytes of response data are stored at the source node beginning with D (the beginning word for storing response data).

		Source node			Destination node N
15			0
S					Command
				"n" bytes	Analysis
				of com-
(S –1)		…	…	mand
				data
	n
+ 2

Response

	D		…
	(D –1)
CMND(194)	+	m
		2

SS: Source node beginning send word

DD: Destination node beginning receive word

C: Source node first control data word

C

"m" bytes	Execution
of
response
data

15 0

C

"n" bytes of command data

0000 to 07C6 (Hex): 0 to 1,990 words

15 0

C+1

"m" bytes of response data

0000 to 07C6 (Hex): 0 to 1,990 words

	15	11	8 7	0
C+2	0		0	C+4

15		11	8 7	3	0
	0			0

Destination network address 00 (Hex): Local network

01 to 7F (Hex): 1 to 127

15 8 7 0

C+3

Destination unit address

00 (Hex): PLC's CPU Unit15

01 to 0F (Hex): Computer (user program)

	(02 to 0F (Hex) are used C+5
	when using Controller Link
	Support Boards for PCI
	Bus only.)
10 to 1F (Hex): Unit nos. 0 to 15
FE (Hex):	Unit connected to network

Destination node N

00 to 20 (Hex): 0 to 32 (or 00 to 3E (Hex): 0 to 62)

The same data can be broadcast to all nodes

on the network by setting the destination node address to FF (Hex).

The range of node addresses will vary for networks other than Controller Link Networks.

Number of retries

0 to F (Hex): 0 to 15 retries Communications port number: 0 to 7 (Hex)

0:Response required

1:Response not required

10 8 7 3 0

Response monitor time 0000 (Hex): 2 s

0001 to FFFF (Hex): 0.1 to 6,553.5 s

(Unit: 0.1 s)

If the baud rate is slow, then setting a small value may generate an error. The standard is approximately 4 seconds at 1 Mbps or 8 seconds at 500 kbps.

Note 1. When using CVM1 and CV-series PLCs manufactured prior to April 1996, the local network address cannot be set to “00.” Set a number other than

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