Introduction

This Driver implements the Modbus protocol, which allows an Elipse application to communicate with any slave device that implements this protocol in ASCII, RTU, or TCP modes.

This Driver always works as a master of a Modbus network. If users want to use a Driver to communicate with master devices, then Elipse's Modbus Slave Driver must be used, which can be downloaded at Elipse's website.

Modbus Driver, starting at version 2.00, was developed using Elipse's IOKit library. This library is responsible for implementing the physical layer access (Serial, Ethernet, Modem, or RAS). For more information about IOKit configuration, please check topic Documentation of I/O Interfaces.

It is recommended to start by reading topic Quick Configuration Guide if the device is fully compliant with standard Modbus protocol, defined by the Modbus Organization (modbus.org), and if users only want to read or write bits and registers, without using more advanced Driver features.

For a complete understanding of all Driver functionality, it is recommended to start reading, in this order, chapters Adding a Driver to an Elipse Application and Configuration.

To create large scale applications, it is also recommended to read topic Performance Tips.

If users are not familiar with the protocol, please check the following topics:

·Modbus Protocol

·Recommended Websites

·Supported Functions

·Special Functions