Modbus Expert Tool

TCP/RTU Frame Analyzer, Function Codes & Pinouts

Modbus TCP/RTU Frame Analyzer

Voer Hexadecimaal Frame in (bijv: 00 12 00 00 00 06 01 04 00 00 00 01)

Function Codes & I/O Ranges

Code	Type	Beschrijving	I/O Range
01	1-bit	Read Coils	00001 - 10000
02	1-bit	Read Discrete Inputs	10001 - 20000
03	16-bit	Read Holding Registers	40001 - 50000
04	16-bit	Read Input Registers	30001 - 40000
05	1-bit	Write Single Coil	00001 - 10000
06	16-bit	Write Single Register	40001 - 50000
15	1-bit	Write Multiple Coils	00001 - 10000
16	16-bit	Write Multiple Registers	40001 - 50000

DB9 Pin Assignments (MGate)

9 8 7 6
. . . .
. . . . .
5 4 3 2 1

DB9 Male (Aanzicht connector)

RS-485 2-wire gebruikt Pin 3 (D+) en Pin 4 (D-).