I will help to establish modbus rtu communication plc, vfd, hmi, PC

Modbus RTU and TCP/IP offer several significant advantages like simplicity, standard, and open availability of many devices.

Modbus registers are organized into four main categories: 

Discrete Input Coils, Discrete Output Coils, Input Registers, and Holding Registers. Here's a brief overview of each category:

01 (0x01) Read Coils

02 (0x02) Read Discrete Inputs

03 (0x03) Read Holding Registers

04 (0x04) Read Input Registers

05 (0x05) Write Single Coil

06 (0x06) Write Single Register

08 (0x08) Diagnostics (Serial Line only)

11 (0x0B) Get Comm Event Counter (Serial Line only)

15 (0x0F) Write Multiple Coils

16 (0x10) Write Multiple Registers

Modbus is a widely supported communication protocol in the industrial automation and control industry. The Flowwing  Listed Items are Support Modbus-

1)Programmable Logic Controllers (PLCs):

Many PLCs from different manufacturers support Modbus communication.

2)Remote Terminal Units (RTUs):

3)Distributed Control Systems (DCS):

4)Remote Terminal Units (RTUs):

5)Variable Frequency Drives (VFDs):

6)Human-Machine Interfaces (HMIs):

7)Metering and Sensor Devices:

I8)industrial Gateways and Bridges: