Modbus Datatypes & Function Codes

Data Types Cases:

Datatypes case no
Datatype (RTU/ASCII)
Datatype (TCP/IP)

0

Float ABCD

1

Float DCBA

2

Float BADC

3

Float CDAB

Float CDAB

4

UINT ABCD

5

UNIT DCBA

6

UINT BADC

7

UINT CDAB

UINT CDAB

8

INT ABCD

9

INT DCBA

10

INT BADC

11

INT CDAB

INT CDAB

12

INT AB

INT AB

13

INT BA

14

UINT AB

UINT AB

15

UINT BA

16

UINT ABCDEFGH

17

INT ABCDEFGH

Function Code cases

Function Code
Description

1

Coil Status

2

Input Status

3

Holding Register

4

Input Register

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