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139
Host Link Function for Replacing Existing PLCs
Section 4-6
Note
For pre-Ver. 1.2 Units, the number of words that can be read and written per
frame (i.e., the text lengths) when using C-mode commands is different for C-
series Host Link Units and CS/CJ-series Serial Communications Boards/
Units. A host computer program previously used for C-series Host Link Units
may not function correctly if it is used in CS/CJ-series PLCs. When using
Serial Communications Boards/Units with Unit Ver. 1.2 or later, these pro-
grams can be reused by setting the Host Link compatible device mode to
mode C (C500/120) or mode D (D200H). (Alternatively, check the host com-
puter program before using it and make any corrections required to handle dif-
ferent frame text lengths. Refer to the
CS/CJ-series Communications
Commands Reference Manual
(W342) for details.)
4-6
Host Link Function for Replacing Existing PLCs
An enhanced Host Link function is provided to enable reuse of host computer
programs created for the existing PLC. By selecting the 1:N/1:1 Host Link pro-
tocol and the Host Link compatible device mode according to the existing PLC
model, the Board/Unit’s Host Link functions can be fully compatible with the
Host Link of the existing PLC.
4-6-1
Support for 1:1 Host Link
Pre-Ver. 1.2 Units
The C200H-LK101/201/202, C500-LK101/201/103/203, and C120-LK101/
201/202 Host Link Units for earlier C-series PLCs (C200H and C500) enable
selection of either 1:1 or 1:N Host Links. The CS/CJ-series and later PLCs,
however, only support 1:N Host Links. Therefore, the host computer programs
created using 1:1 Host Link protocol cannot be reused in CS/CJ-series PLCs.
CVM1 or CV-
series CPU Units
CVM1/CV-CPU
@@
No changes have been made
in wiring.
It may be possible to use the host computer
programs without alteration as long as the
same communications settings (e.g., baud
rate) are used. It may be necessary, however,
to change programs to allow for different CS/
CJ command specifications.
CVM1 or CV-
series Host Link
Unit
CV500-LK201
Previous
products
Model number
Changes required for CS/CJ-series product
Wiring
Other
Summary of Contents for SYSMAC CJ1W-SCU21-V1
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi...
Page 89: ...60 Basic Operating Procedure Section 1 9...
Page 151: ...122 RS 232C and RS 422A 485 Wiring Section 3 4...
Page 173: ...144 Host Link Function for Replacing Existing PLCs Section 4 6...
Page 223: ...194 Enhanced Protocol Macro Functions Section 5 6...
Page 277: ...248 Communications Frames Section 6 8...
Page 291: ...262 Basic Operating Procedure in No protocol Mode Section 7 4...
Page 301: ...272 Auxiliary Area and CIO Area Allocations Section 8 3...
Page 391: ...362 Introduction Appendix A...
Page 421: ...392 CompoWay F Master Protocol Appendix B...
Page 513: ...484 E5 K Digital Controller Read Protocol Appendix F...
Page 571: ...542 E5ZE Temperature Controller Write Protocol Appendix I...
Page 587: ...558 E5 J Temperature Controller Protocol Appendix J...
Page 627: ...598 ES100 Digital Controller Protocol Appendix K...
Page 661: ...632 V500 V520 Bar Code Reader Protocol Appendix M...
Page 697: ...668 3Z4L Laser Micrometer Protocol Appendix N...
Page 717: ...688 Visual Inspection System Protocol Appendix O...
Page 755: ...726 V600 V620 ID Controller Protocol Appendix P...
Page 763: ...734 Hayes Modem AT Command Protocol Appendix Q...
Page 767: ...738 Changing Communications Port Settings Using STUP 237 Appendix R...
Page 781: ...752 Revision History...