Modbus Slave

The MODBUS Slave Driver was designed for use with serial devices that support the MODBUS RTU or MODBUS ASCII protocol as "Master".

MODBUS Protocol is a messaging structure developed by Gould Modicon in 1979, used to establish master-slave/client-server communication between intelligent devices. It is a de facto standard, truly open and the most widely used network protocol in the industrial manufacturing environment. It is literally implemented by hundreds of vendors on thousands of different devices in order to transfer discrete/analog I/O and register data between control devices.

 

MODBUS is an application layer messaging protocol, positioned at level 7 of the OSI model, that provides client/server communication between devices connected on different types of buses or networks.

The MODBUS protocol has been accepted by the IEC as a Public Available Specification (IEC PAS 62030).

The MODBUS Slave driver has been developed to support a wide range of MODBUS compatible devices available in the automation world.

 

The driver simulates one or more MODBUS slaves, defined as stations. The data of the slaves can be defined as tasks, associating the tags of the supervisor to the MODBUS addresses of a slave (station).

The driver supports the following Function Codes: 01H = Read Coils, 02H = Read Discrete Inputs, 03H = Read Holding Registers, 04H = Read Input Registers, 05H = Write Single Coil, 06H = Write Single Register, 07H = Read Exception Status, 0FH = Write Multiple Coils, 10H = Write Multiple Registers.

The driver manages also broadcast messages (messages sent to the dummy slave 0) for the following Function Codes: 05H, 06H, 0FH, 10H.

 

For more information, please see the section "Addressing".

 

Release

11.4.1.3 DBL266

 

Interface Device

Any standard Modbus Master device

 

Manufacturer

Modbus

 

Requirement/Description

Modbus RTU or Modbus ASCII protocol as Slave

 

License Code

License Code Not Required

 

Import Tags

Support Import Tags

 

Operating System

 

Downloads

 

 

Modbus RTU/ASCII Slave

 

Modbus RTU/ASCII Slave- Win Ce

 

 

For more information on this driver please refer to the help relating to the driver in Movicon 11.