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Protocol Conversion
Section 6-5
System Configuration Patterns
Sending FINS Messages Using CMND(490) in CPU Unit’s Ladder Program
The Board/Unit converts the FINS messages to Modbus-RTU protocol for
sending in this operation.
Access from CPU Unit (on the Same PLC)
Access from CPU Unit (on Network PLC)
CPU Bus-to-Serial
Details
Routing tables to
treat serial
communications
path as network
OMRON Inverters connected serially to
the Serial Communications Board/Unit
using Modbus-RTU can be accessed
from a CPU Unit in the same PLC.
Optional
2804
Serial Communications Unit/Board
CPU Unit
FINS header
CMND(490)
FINS message
RS-485 (Modbus-RTU)
Protocol
conversion
Modbus-RTU
command
Modbus-RTU
command
Modbus-RTU
Slave device
(e.g, OMRON
Inverter)
FINS message-to-Serial
Details
Routing tables
to treat serial
communications
path as network
OMRON Inverters connected serially to
the Serial Communications Board/Unit
using Modbus-RTU can be accessed
from a CPU Unit in a PLC connected to
the network.
Optional
2804
CMND(490)
FINS header
CPU Unit
Serial Communications Unit/Board
RS-485 (Modbus-RTU)
FINS message
Modbus-RTU
command
Modbus-RTU
command
Protocol
conversion
Network (Ethernet,
Controller Link,
DeviceNet)
Modbus-RTU
Slave device
(e.g, OMRON
Inverter)
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...