MODBUS Protocol Library

MODBUS is an industrial data communication protocol used to control PLC's and automation machines connected through serial lines (RS-232, RS-422, RS-485) or Ethernet TCP/IP connections.

Perform easily master or slave device functionality in you application written for example with C++, C#, Delphi, Visual Basic (incl. NET), Java, etc.

The SuperCom MODBUS Protocol Library provides a rock solid foundation to develop fast robust MODBUS capable applications. The SuperCom MODBUS Protocol Library hides the complex MODBUS protocol offering one easy to use set of functions that can communicate data packets over serial and TCP/IP connections thus saving valuable time, reducing costs and ensuring quality results.

The SuperCom MODBUS Protocol Library supports data communication between devices connected to a serial port, on a bus system (RS-485) or ethernet network (TCP/IP). The protocol module supports ASCII and RTU (Remote Terminal Unit) operation mode (ASCII mode transfers ASCII codes and RTU binary data bytes in binary mode).

There is only one API to learn! The same functions and parameters with Serial, TCP/IP or ISDN type of connections and operation mode (Modbus ASCII, Modbus RTU, Modbus TCP).

The SuperCom MODBUS Protocol Library also supports custom function codes and data packets by implementing functions that communicate transparently. Controlling machine specific extensions is realy easy using these functions.

Accomplish with ease
In most cases only a handful functions are needed to talk to the PLC. Your project is updated real fast. A lot of functions is backing you up to accomplish different tasks or configurations.

• Run a single or multiple simultaneous connections to modbus devices (up to 255 connections per application).
• Run multiple Modbus masters.
• Connect one or more MODBUS RTU or ASCII masters to one or more Modbus slaves.
• The SuperCom MODBUS protocol module can control, based on the used SuperCom software, serial and/or TCP/IP connections.
• The SuperCom MODBUS protocol module can run concurrently connections thus polling more than one plc the same time is possible.
• Receive Modbus data packets and simulate one or more MODBUS slaves or Protocol Gateway.
• Create your own Modbus Gateway or Bridge to route data between serial interface and TCP/IP network, for example a MODBUS TCP to MODBUS RTU Gateway.
• Use SuperCom for Modbus bridging (e.g. serial to TCP/IP).
• Create your own Protocol Gateway using one of the other SuperCom industrial protocols (PLC protocols) offered or use your own custom protocol.
• Create your own Modbus Slave that can handle requests on its own or handed over to the application (manual mode) or mixed. A Modbus Slave, created with SuperCom, can support up to 254 concurrent client connections.
• Use with PLC from SIEMENS, Allen Bradley, other Modbus capable PLC, Modbus devices and controller. A pre-installed MODBUS protocol module on PLC or connected controller or device assumed.
• Receiving and transmitting of Modbus raw data is supported
• Low level Data monitoring and recording also supported.

The SuperCom MODBUS Protocol Library uses the SuperCom Communication Layer which provides a rock solid foundation to develop data communication software fast and without headache. Thus it makes no difference to the programmer if the MODBUS protocol used over TCP/IP or serial lines (RS-232, RS-422, RS-485, Modem, TAPI).