Big/Little Endian Setup; Coverage Of Endian; Parameter Enable; Communication Command That Can Be Used By This Function - Omron 3G3MX2 User Manual

ModBus mapping
B-5-2

Big/Little endian setup

B-5-2-1 Functional outline
B-5-2-2 Setting parameter
B-5-2-3

Coverage of endian

B-5-2-4

Parameter enable

B-5-2-5

Communication command that can be used by this function

354
It allows to change the message structure of the Modbus, USB and Option
communication.
P400 (Big endian / Little endian selection)
Func. Code

Big/Little endian
selection
Example:
Word Data = 0x0102, Double Word Data = 0x01020304
Word Data / Endian of Word Data:
No. Big endian
1 01
2 02
Double Word Data / Endian of Double Word Data
No. Big endian
1 01
2 02
3 03
4 04
Note The software tool will not operate if modified.
Endian is applied only to the register data.
It is not applied to the coil and the register number, etc.
P400: Changes on this parameter becomes effective at power ON or after a
reset.
The list of the communication that can use this function are shown below.
Modbus communication command (RS485, USB)
No. Modbus function code
1
2
3
4
Name
00: Big endian
01: Little endian
02: Special endian
Little endian Special endian
02
01
Little endian Special endian
04
03
02
01
Function name
03h Read Holding Register
06h Write Single Register
10h Write Multiple Registers
17h Read/Write Multiple Registers
Section B-5
Settings
01
02
03
04
01
02
EU
00