Omron SYSDRIVE MX2 SERIES User Manual

6-5
6-4 Modbus Communication (Modbus-RTU) Protocol
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
6
Communication Function
Data read or loop-back cannot be performed while broadcasting.
Although slave addresses 1 to 247 are used under the Modbus specification, the master can
use any of slave addresses 250 to 254 to broadcast to each group. (The slaves do not return
a response.)
Note that this function is effective only with write commands (05h, 06h, 0Fh and 10h).
Parameter No.
Use a Parameter No. to specify the function to be executed by the Inverter.
Supported Parameter Nos. are shown below.
Parameter No.
Data
Send data relating to a Parameter No.
The data transmission format varies depending on the Parameter No.
The 3G3MX2 Series supports the data types specified below, among the types used in
Modbus communication (Modbus-RTU).
Slave address Recipient
250 (FAh) Broadcast it to slave addresses 01 to 09.
251 (FBh) Broadcast it to slave addresses 10 to 19.
252 (FCh) Broadcast it to slave addresses 20 to 29.
253 (FDh) Broadcast it to slave addresses 30 to 39.
254 (FEh) Broadcast it to slave addresses 40 to 247.
Parameter No. Function
Maximum number
of data bytes
in 1 message
Maximum data number in
1 message
01h Read the status of a coil 4 32 coils (in bit)
03h
Read the content of a holding
register
32
16 registers (in byte)
05h Write into a coil 2 1 coil (in bit)
06h Write into a holding register 2 1 register (in byte)
08h Loop-back test −−
0Fh Write into multiple coils 4 32 coils (in bit)
10h Write into multiple registers 32 16 registers (in byte)
17h
Read from or write into multiple
holding resisters
32/32
16/16 registers (in byte)
Data name Description
Coil Binary data (1 bit) that can be read or written
Holding register 16-bit data that can be read or written

Omron SYSDRIVE MX2 SERIES Specifications

General

Brand	Omron
Model	SYSDRIVE MX2 SERIES
Category	Inverter
Language	English