SuperCom MODBUS library is a developers library to be used with modern compiler like C, C++, C#, Delphi, Java, VB net, Python etc. in order to control Modbus aware plc. The SuperCom MODBUS library supports client and server (old: master/slave) RTU and ASCII through serial ports and TCP/IP.
Perform easily Modbus client-server device functionality in your application written for example with C++, C#, Delphi, LabVIEW, Pascal, Visual Basic (incl. NET, NET Core) or Java.
Modbus protocol library for TCP RTU over TCP. Bridge RTU over IP Gateway. Modbus for serial RS-485 library. MODBUS/TCP Master and Slave. Data Acquisition Products. MODBUS Protocol with LabView samples. Modbus Master Protocol library. Modbus bridging serial to TCP/IP. Serial MODBUS Library. MODBUS Library with Siemens S7.
Modbus driver RTU and ASCII. Data transmission using MODBUS Protocol. Modbus Library.
Modbus TCP slave to Modbus Master converter. Connect a Master Modbus RTU RS232, RS485 with one or more Modbus TCP slaves / servers. Modbus master on serial and slaves on Ethernet (TCP).
Delphi Unit supporting Modbus protocol library.
Labview Modbus library.
MODBUS Communication Library for Windows
MODBUS Communication Library for Linux
Samples for Modbus RTU Client / Server. Modbus protocol samples written in C, C++, C#, Delphi, Pascal, Java, .NET, Python, Visual Basic, VB net.
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.
The SuperCom MODBUS protocol library supports fast direct reading of Modbus data. Reading or modifying registers, coils, inputs etc. Direct data communication via Modbus TCP or Modbus serial and operation mode Modbus RTU, Modbus ASCII, Modbus TCP etc.
SuperCom MODBUS library is a developers library to be used with modern compiler like C, C++, C#, Delphi, Java, LabView, Pascal, Python, VB net, etc. in order to control Modbus aware plc. The SuperCom MODBUS library supports client and server mode of operation and data transfer in RTU and ASCII mode through serial ports and TCP/IP.
The SuperCom MODBUS Protocol Library contains functions for sending and receiving data via serial or TCP/IP connections to devices respecting the MODBUS protocol.
The SuperCom MODBUS Protocol Library is a very complete and mature MODBUS library and 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 (API) that communicate data packets over serial and TCP/IP connections thus saving valuable time, reducing costs and ensuring quality results.
Perform easily client or server device functionality in you application written for example with C, C++, C#, Delphi, Visual Basic (incl. NET), Java, LabView etc. Many samples included.
The SuperCom MODBUS Protocol Library supports data communication between devices connected to a serial port, on a bus system or 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).
Run up to 255 simultaneous connections with Modbus devices. Each application can open and control up to 255 Modbus devices at the same time. SuperCom functions are thread-safe and work smoothly and particularly quickly even on the most modern multi-core CPUs.
There is only one API to learn! The same functions used 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 of functions are needed to talk to a Modbus capable PLC or controller. Your project is updated real fast. A lot of functions is backing you up to accomplish different tasks or configurations.
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).
The SuperCom MODBUS Protocol Library accesses the Modbus remote station directly without using another software layer (e.g. OPC server or driver from third party) that can cause delays.
SuperCom enables the application to connect to a PLC (nearly from anywhere, e.g. Modem, TAPI, ISDN, Ethernet (TCP/IP) Internet, serial lines e.g. RS-232, RS-422, RS-485) and transfer data and/or read, write operands.
Currently supported compiler
As usual with SuperCom, many well-known compilers are supported. Others are constantly coming. The SuperCom MODBUS library can currently be used with the following compiler languages and compilers: C / C++, C#, Visual C++, C++ Builder, Java, Delphi, Pascal, LabVIEW, PowerBuilder, Python, PureBasic, Visual Basic, Visual Basic .NET (VB .NET), VBA. If you miss one, please inquire. (See also)
1. Read a single coil
The above samples are nearly complete programs. More Init-Sequences can be found here.
2. Read/Write Registers
Capture, Store, Forward - MODBUS Slave or Gateway functions
Communication at lower data packet level is possible thus allowing to capture, store and forward of MODBUS data packets or transmit replies. Monitoring MODBUS data packets, simulating a MODBUS Slave or building a protocol converter / gateway is possible. Simulating a MODBUS Slave can be very handy while testing the software (slave examples available).
The SuperCom MODBUS Library enables secure and stable data communications with different Modbus devices from different manufacturers. It supports almost all known Modbus options and variations.
The SuperCom MODBUS Library implements the standard MODBUS protocol for serial and TCP/IP connections* based on the official specification by the MODBUS organization. SuperCom supports MODBUS ASCII and MODBUS RTU protocol with serial interfaces (RS-232, RS-422, RS-485, Modem, TAPI) and the MODBUS TCP/IP (MODBUS/TCP) and Open MODBUS TCP with TCP/IP networks.
*A corresponding SuperCom license (Serial and/or TCP/IP) assumed.
The SuperCom MODBUS Protocol Library is a very complete MODBUS protocol stack!
Also included, non standard variants of the MODBUS protocol e.g. RTU over IP (also known as MODBUS RTU/IP, MODBUS RTU over TCP) enable the SuperCom application to talk to OMTS devices (OMTS = Out of the MODBUS TCP/IP specification). Since not an official specification, additional names and variants may exists.
Small SuperCom MODBUS Server examples can be found here.
How to use?
The SuperCom MODBUS Protocol Protocol Library can be used over any communication link supported by SuperCom (currently Serial (RS-232, RS-422, RS-485, Modem, TAPI), TCP/IP, ISDN). For a list of available SuperCom packages containing MODBUS protocol, see the following chart.
The use of one common API for Serial, TCP/IP and ISDN applies here too (any SuperCom ActiveX API and/or DLL API).
MODBUS Slave Simulator
Speeds up development process. The Modbus slave support included in this software also provides Modbus simulator software. Especially in the SuperCom Suite package. An easy to use and fast working test environment to deliver quality software. It also supports the creation of software based (virtual) Modbus devices for Modbus clients.
What to order?
You will find promotional combinations with MODBUS (e.g. SuperCom Serial incl. MODBUS, SuperCom for TCP/IP incl. MODBUS, SuperCom Protocol Engine, SuperCom Suite).
The order code 638 or 638400 is needed only when the MODBUS protocol module is ordered later in addition to a SuperCom package. The most preferable way (incl. the best price) is buying one package from the above pricelist already including the MODBUS functionality.
Executables developed using SuperCom MODBUS Protocol Module can be distributed royalty free. More ...
C#, C++, Delphi, Visual C++, Visual Basic, Visual Basic NET, C++ Builder, Borland C/C++, Microsoft C/C++, MinGW, Borland Pascal, Java, LabVIEW, PowerBuilder, Python, PureBasic, VBA and other Windows programming tools (MS .NET ?).
for C/C++, C#, Visual C++, C++ Builder, Java, Delphi, Pascal, Python, Visual Basic, Visual Basic NET (VB .NET), LabVIEW, PureBasic, ...
The SuperCom Suite contains more example programs and especially Modbus Slaves samples supporting multiple clients.
... and the client is now polling real fast consuming low CPU. Great support.
I'm really impressed. Very sophisticated software that works fast and is flexible to use. Excelent work guys!
Great library, the GUI is not blocked.
The slave application works like a charm.
We were really surprised by the short reaction times and how smoothly it works even on multiple concurrent TCP connections.
Works faster than expected!
... issue solved, thanks.
P.., The Netherlands.
MODBUS library | MODBUS RTU | MODBUS ASCII | MODBUS TCP | MODBUS over IP | MODBUS Serial Library | MODBUS RS-485 | MODBUS Slave | MODBUS sample C, C++, C#, Pascal, Delphi, Java, Pascal, Python, LabView, Visual Basic, VBA | MODBUS C library | MODBUS C++ library | MODBUS C# library | MODBUS Delphi library | MODBUS Pascal library | MODBUS Visual Basic library | LabVIEW Modbus library | MODBUS RTU example | MODBUS C Code Example | MODBUS slave simulator