Modbus-TCP

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Modbus TCP client library to interact with Modbus servers such as PLCs.

Modbus-TCP 최신버젼 다운로드

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README
============

Overview
--------
This is an Arduino library for communicating with Modbus server over Ethernet (via TCP protocol). Arduino will act as a Modbus client and request data from Modbus Server(which could be any device or PLC).

Hardware
--------
This library has been tested with an Arduino [Mega](https://www.arduino.cc/en/Main/ArduinoBoardMega) with following Compatible Ethernet ICs.

1. Wizent W5100 - [Ethernet library](https://www.arduino.cc/en/Reference/Ethernet).
2. ENC28J60 - [UIPEthernet library](https://github.com/UIPEthernet/UIPEthernet).
3. ESP8266 - [ESP8266 library](https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/src/ESP8266WiFi.h).

Note: It can be made compatible with Wiznet W5500 model, by adding new [Ethernet2 library](https://github.com/adafruit/Ethernet2) in the header file.

Settings
--------
Depending on the ic used set the following Macros.

1. define WIZNET_W5100 = 0
2. define ENC28J60     = 0
3. define ESP8266      = 1

Features
--------
The following Modbus functions have been implemented:

Discrete Coils/Flags

* 0x01 - Read Coils
  * 0x02 - Read Discrete Inputs
  * 0x05 - Write Single Coil
  * 0x0F - Write Multiple Coils

Registers

* 0x03 - Read Holding Registers
  * 0x04 - Read Input Registers
  * 0x06 - Write Single Register
  * 0x10 - Write Multiple Registers
  * 0x16 - Mask Write Register
  * 0x17 - Read Write Multiple Registers

Modbus-TCP

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