Omron SYSDRIVE MX2 SERIES, User Manual

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8 Communications Functions
8 - 30 Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
z Executable function codes
This function is enabled only for the function codes listed below.
Other function codes will be processed in big endian.
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.
• 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).
Function code
03 hex Read from multiple holding registers
06 hex Write to a holding register
10 hex Write to multiple holding registers
17 hex Read/Write from/to multiple holding registers
When using CX-Drive: When the CX-Drive is used to read/write parameters, be sure to
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.
When using communi-
cations option units:
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.