![background image](http://html.mh-extra.com/html/omron/c200hw-clk21/c200hw-clk21_operation-manual_742483210.webp)
185
Introduction
Section 6-1
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing 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.
CQM1H-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).
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
“00” as the local network address in the routing tables, and then specify
that number.
CMND
S
D
C
"n" bytes
of com-
mand
data
"m" bytes
of
response
data
S
15
0
S: Source node beginning send word
D: Destination node beginning receive word
C: Source node first control data word
Source node
Destination node N
(S –1)
+
n
2
D
(D –1)
+
m
2
Command
Response
Analysis
Execution
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.
C+1
C+4
0
0
Number of retries
0 to F (Hex): 0 to 15 retries
0: Response required
1: Response not required
C
"n" bytes of command data
0000 to 07C6 (Hex): 0 to 1,990 words
0
"m" bytes of response data
0000 to 07C6 (Hex): 0 to 1,990 words
15
0
C+3
15
8 7
0
Destination unit address
00 (Hex):
PLC's CPU Unit
01 to 0F (Hex): Computer (user program)
10 to 1F (Hex): Unit nos. 0 to 15
FE (Hex):
Unit connected to network
15
10 8 7
3
0
15
10 8 7
3
0
Response monitor time
0000 (Hex):
2 s at 2 Mbits/s
4 s at 1 Mbit/s
8 s at 500 kbits/s
0001 to FFFF (Hex): 0.1 to 6,553.5 s
(Unit: 0.1 s)
C+2
0
0
15
11
8 7
0
Destination network address
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
C+5
15
0
…
…
…
(02 to 0F (Hex) are used
when using Controller Link
Support Boards for PCI Bus
only.)
Summary of Contents for C200HW-CLK21
Page 3: ...iv ...
Page 9: ...x ...
Page 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Page 13: ...xiv ...
Page 19: ...xx ...
Page 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Page 69: ...44 Message Service Procedure Section 2 2 ...
Page 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Page 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 261: ...236 Response Codes Section 6 7 ...
Page 297: ...272 Message Delay Times Section 8 4 ...
Page 353: ...328 Handling Precautions Section 9 6 ...
Page 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 369: ...344 Standard Models Appendix A ...
Page 391: ...366 Using the Relay Terminal Block Appendix C ...
Page 397: ...372 Index ...
Page 401: ...376 Revision History ...