Modbus 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).
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 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 or network. 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 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).
SuperCom enables the application to connect to a PLC (nearly from anywhere, e.g. Modem, TAPI, ISDN, Ethernet (TCP), serial lines e.g. RS-232, RS-422, RS-485) and transfer data and/or read, write operands.
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 Protocol 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.
Also included, non standard variants of the MODBUS protocol called 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.
A very extensive and complete protocol stack!
How to use?
The SuperCom MODBUS 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).
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 and/or 638400 is needed only when the MODBUS protocol module is ordered later in addition to a current SuperCom package.
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, Perl, PowerBuilder, PureBasic, VBA and other Windows programming tools (MS .NET ?).
for C/C++, C#, Visual C++, C++ Builder, Java, Pascal/Delphi, Visual Basic, Visual Basic NET (VB .NET), LabVIEW, Perl, PureBasic, ...
The SuperCom Suite contains and supports more example programs especially Modbus Slaves supporting multiple clients.