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348
Serial Communications
Section 6-3
Modbus-RTU commands can be set simply by turning ON a software switch
after setting the Modbus slave address, function, and data in the DM fixed
allocation words for the Modbus-RTU Easy Master. The response when
received is also store in the DM fixed allocation words for the Modbus-RTU
Easy Master.
DM Fixed Allocation
Words for the
Modbus-RTU Easy
Master
The Modbus-RTU command is stored in the following words in the DM Area.
• M-type CPU Units
Serial port 1: D32200 to D32249
Serial port 2: D32300 to D32349
• L-type CPU Units
Serial port 1: D32300 to D32349
When a response is received after turning ON the Modbus-RTU Master Exe-
cution Bit, it is sotred in the following words in the DM Area.
• M-type CPU Units
Serial port 1: D32250 to D32299
Serial port 2: D32350 to D32399
• L-type CPU Units
Serial port 1: D32350 to D32399
15 08
07
00
D32200
---
---
D32201
---
---
D32202
D32203
OMRON Inverters
3G3JV, 3G3MV, or
3G3RV
Communications are easily achieved
by simply by turning ON A641.00
after setting the Modbus-RTU
command in the DM fixed allocation
words.
Slave address
Function code
Number of communications data bytes
Communications data
Slave address
Function code
Communications data
Slave address
Function code
Communications data
Modbus-RTU Master
Execution Bit for Port 1
A641.00
Modbus-RTU
:
:
Words
Bits
Contents
Serial port 1
on M-type
CPU Unit
Serial port 2
on M-type
CPU Unit
or
Serial port 1
on L-type
CPU Unit
D32200
D32300
00 to 07 Command Slave address (00 to F7 hex)
08 to 15
Reserved (Always 00.)
D32201
D32301
00 to 07
Function code
08 to 15
Reserved (Always 00.)
D32202
D32302
00 to 15
Number of communications
data bytes (0000 to 005E
hex)
D32203 to
D32249
D32303 to
D32349
00 to 15
Communications data
(94 bytes maximum)
Содержание CP1L - 12-2007
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 428: ...395 Clock Section 6 9...
Страница 429: ...396 Clock Section 6 9...
Страница 523: ...488 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...496 Replacing User serviceable Parts Section 10 2...
Страница 563: ...528 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...576 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...603 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...604 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...634 Index...
Страница 671: ...636 Revision History...