Holding Register Big Endian L Ittle Endian Select - Hitachi WJ200-001S Instruction Manual

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Holding register big endian・ ・ ・ ・ Little endian select
The purpose of this document is to explain what Endians are and how they work. After reading this
document, you can configure the Endian setting for Modbus communications for your purposes.
Endian means how data are arranged in a particular order.
There are three kinds of Endians: Big endian, Little endian and Special endian.
[Setting range]
Item
Endian Setting
Constraint:
Only data in Queries and Responses are subject to this Endian function.
Therefore Coils, register addresses and function codes are not affected by this function.
When any Endian setting is changed, either power cycle or reset is required for the change to become
effective.
[1]Communication command that can be used by this function
The list of the communication that can use this function is shown below.
Table: Modbus communication command (RS485, USB)
No
Function code
P400
Modbus Function Code
1
2
3
4
Data
00 Big Endian (Default)
01 Little Endian
02 Special Endian
03H Read Holding Resister
06H Write in Holding Register
10H Write in Registers
Read/Write Holding
17H
Register
Description
Function name