4
Overview
Section 1-2
Note
(1) The Host Link 1:1 and no-protocol modes are supported by unit version
1.2 or later.
(2) Only a 1:N NT Link is supported. A 1:1 NT Link is not supported.
(3) The Modbus-RTU slave mode is supported by unit version 1.3 or later.
A serial communications mode for the Serial Gateway is also provided,
enabling connection with the following devices.
1-2-2
Serial Communications Units
The Serial Communications Units are CPU Bus Unit. One or more Units can
be mounted to the CPU Unit or a CS/CJ Expansion Rack. A total of up to 16
CPU Bus Units can be controlled by one CPU Unit. The CS-series Serial
Communications Unit must be used for a CS-series PLC and a CJ-series
Serial Communications Unit must be used for a CJ-series PLC.
Two serial ports are provided for connecting host computers, Programmable
Terminals (PTs), general-purpose external devices, and Programming
Devices (excluding Programming Console). This makes it possible to easily
increase the number of serial ports for the CS/CJ-series PLC.
CS Series
PLC (Host Link)
CPU Unit
FINS message
FINS message
PLC (Host Link)
Serial Communi-
cations Board
with unit version
1.2 or later
Protocol
conversion
Protocol
conversion
Modbus-RTU-compatible
device (e.g., Inverter)
Modbus-ASCII-compatible
device (e.g., Servo)
CompoWay/F-
compatible
OMRON
component
Modbus-RTU-compatible
device (e.g., Inverter)
Modbus-ASCII-compatible
device (e.g., Servo)
CompoWay/F-
compatible
OMRON
component
Serial Communications Unit
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...