Dm Fixed Allocation Words For The Modbus-Rtu Easy Master - Omron CP1L-EL20DR-D Operation Manual

Serial Communications
Communications are easily achieved
by simply by turning ON A641.00
after setting the Modbus-RTU
command in the DM fixed allocation
words.
Modbus-RTU Master
Execution Bit for Port 1
A641.00
DM Fixed Allocation
Words for the
Modbus-RTU Easy
Master
406
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.
D32200
D32201
D32202
D32203
:
:
SYSMAC
CP1L
COM 01 03 05 07 09 11 01 03 05 07 09 11
NC 00 02 04 06 08 10 00 02 04 06 08 10
POWER
RUN
ERR/ALM
INH
LNK/ACT
BKUP
1 2
00 01 02 03 04 06 00 01 03 04 06
ANALOG INPUT COM(V+) COM 05 07 COM 02 COM 05 07
V1+ V2+ COM
MAC Address:
01234567890A
The Modbus-RTU command is stored in the following words in the DM Area.
• EM-type CPU Units
Serial port 1: D32200 to D32249
Serial port 2: D32300 to D32349
• EL-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.
• EM-type CPU Units
Serial port 1: D32250 to D32299
Serial port 2: D32350 to D32399
• EL-type CPU Units
Serial port 1: D32350 to D32399
Words
Serial port 1 Serial port 2
on EM-type on EM-type
CPU Unit CPU Unit
or
Serial port 1
on EL-type
CPU Unit
D32200 D32300
D32201 D32301
D32202 D32302
D32203 to D32303 to
D32249 D32349
15 08 07 00
--- --- Slave address
Function code
--- ---
Number of communications data bytes
Communications data
Slave address Function code
Slave address Function code
Modbus-RTU
Bits
00 to 07 Command Slave address (00 to F7 hex)
08 to 15 Reserved (Always 00.)
00 to 07 Function code
08 to 15 Reserved (Always 00.)
00 to 15 Number of communications
data bytes (0000 to 005E
hex)
00 to 15 Communications data
(94 bytes maximum)
Section 8-3
Communications data
Communications data
OMRON Inverters
3G3JV, 3G3MV, or
3G3RV
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