342
Serial Communications
Section 6-1
Note
A setting can be made to delay the transmission of data after the execution of
TXD(236).
Refer to the
SYSMAC CP Series CP1H CPU Unit Programming Manual
(W451) for more details on TXD(236) and RXD(235).
6-1-3
Modbus-RTU Easy Master Function
Overview
If an RS-232C or RS-422A/485 Option Board is used, the CP1H CPU Unit
can function as a Modbus-RTU Master to send Modbus-RTU commands by
manipulating software switches. This enables easily controlling Modbus-com-
pliant slaves, such as Inverters, through serial communications.
The following OMRON Inverters support Modbus-RTU slave operation:
3G3JV, 3G3MV, and 3G3RV.
The communications mode in the PLC Setup must be set to the Gateway
Mode to enable this functionality.
Time
Execution of TXD(236)
Delay time
Transmission
Summary of Contents for CP1H CPU UNITS - PROGRAMMING 05-2007
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Page 3: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised March 2009...
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Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 174: ...140 CP series Expansion I O Unit Wiring Section 3 6...
Page 370: ...336 Analog I O XA CPU Units Section 5 5...
Page 552: ...518 Trouble Shooting Section 8 7...
Page 595: ...561 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 598: ...564 Sample Application Section 9 12...
Page 642: ...608 Standard Models Appendix A...
Page 652: ...618 Dimensions Diagrams Appendix B...
Page 745: ...711 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 746: ...712 Connections to Serial Communications Option Boards Appendix F...
Page 776: ...742 PLC Setup Appendix G...
Page 778: ...744 Specifications for External Power Supply Expansion Appendix H...
Page 786: ...752 Revision History...