Omron MX2 Series User Manual page 442

8 Communications Functions
Executable function codes
This function is enabled only for the function codes listed below.
Other function codes will be processed in big endian.
Function code
03 hex
06 hex
10 hex
17 hex
Precautions for Correct Use
• The Modbus mapping endian function settings are reflected on not only Modbus communica-
tion, but also USB communications and communications option units.
Set and use the USB communications and communications option units as follows.
When using CX-Drive: When the CX-Drive is used to read/write parameters, be sure to
When using communi-
cations option units:
• The Modbus mapping endian function does not work with the fault monitor functions (Regis-
ter No.: 0012 to 004E hex).
To use the fault monitor functions, be sure to set P400 to 00 (Big endian).
8 - 30
Read from multiple holding registers
Write to a holding register
Write to multiple holding registers
Read/Write from/to multiple holding registers
set in advance the Modbus Mapping Endian Selection (P400) to
00 (Big endian).
If the Modbus Mapping Endian Selection (P400) is not set to 00
(Big endian), parameter data cannot be processed normally.
Be sure to set the Modbus Mapping Endian Selection (P400) to 00
(Big endian). Otherwise, the internal process cannot be performed
normally between the inverter and communications option unit.
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)