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186
Introduction
Section 6-1
2.
With the message service, there is no guarantee that a message to a des-
tination node will reach its destination. It is always possible that the mes-
sage may be lost in transit due to noise or some other condition. When
using the message service, it is advisable to prevent this situation from oc-
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.
Example: Commands for CVM1, CV-series and CS/CJ-series PLCs
Type of command
Code
CS/
CJ
CVM1/
CV
For memory areas (CIO,
DM, EM, TC, transition, step,
forced ON/OFF)
MEMORY AREA READ
0101
Yes
Yes
MEMORY AREA WRITE
0102
Yes
Yes
MEMORY AREA FILL
0103
Yes
Yes
MULTIPLE MEMORY AREA
READ
0104
Yes
Yes
MEMORY AREA TRANS-
FER
0105
Yes
Yes
For parameter areas (PLC
system setting, I/O table reg-
istration, routing table, etc.)
PARAMETER AREA READ
0201
Yes
Yes
PARAMETER AREA WRITE 0202
Yes
Yes
PARAMETER AREA CLEAR 0203
Yes
Yes
For program areas (UM)
PROGRAM AREA PRO-
TECT
0304
Yes
Yes
PROGRAM AREA PRO-
TECT CLEAR
0305
Yes
Yes
PROGRAM AREA READ
0306
Yes
Yes
PROGRAM AREA WRITE
0307
Yes
Yes
PROGRAM AREA CLEAR
0308
Yes
Yes
PLC mode
RUN
0401
Yes
Yes
STOP
0402
Yes
Yes
PLC model data
CONTROLLER DATA READ 0501
Yes
Yes
CONNECTION DATA READ
0502
Yes
Yes
PLC status data
CONTROLLER STATUS
READ
0601
Yes
Yes
CYCLE TIME READ
0620
Yes
Yes
PLC internal clock
CLOCK READ
0701
Yes
Yes
CLOCK WRITE
0702
Yes
Yes
Messages
MESSAGE READ
0920
Yes
Yes
MESSAGE CLEAR
Yes
Yes
FAL/FALS READ
Yes
Yes
Access rights
ACCESS RIGHT ACQUIRE
0C01
Yes
Yes
ACCESS RIGHT FORCED
ACQUIRE
0C02
Yes
Yes
ACCESS RIGHT RELEASE
0C03
Yes
Yes
Error data
ERROR CLEAR
2101
Yes
Yes
ERROR LOG READ
2102
Yes
Yes
ERROR LOG CLEAR
2103
Yes
Yes
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 ...