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Tag: modbus
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SCHNEIDER TOSHIBA - Electrical Industry

Communication card validation dedicated to implement industrial network protocols. In this case the cards are added to PLCs to control the speed of electric motors.

DLL development of communication protocols: Metasys, BacNet, CClink, Ethernet IP, Modbus TCP, Apogee Test sequence developement Integraton in the existing test bench

Technics:

Tools: LabWindows/CVI, TestStand, Visual Studio C++ Hardware: test bench with DIO, DAQ and network cards, dedicated product interface
LabVIEW Real-Time: refrigeration system with two temperatures

This system allows the study of refrigeration systems and the implementation of the thermodynamic calculations applied to refrigeration. Its uniqueness is that it is fully controllable via the Internet directly from a web browser like Internet Explorer or Firefox.

It consists of two cold rooms, each with their own evaporator but sharing the same cooling fluid R134a system (compressor, condenser ...).

The control and configuration of this system can be done in two ways:

a classic console coupled to a regulator PLC type industrial PAC (programmable automation controller) Compact Fieldpoint

The Compact Fieldpoint adds the possibility of remote control via the Internet, viewing the evolution curves of temperature, air and refrigerant fluid, pressure and power at various points. This allows calculating the required cooling system features such as enthalpy, entropy, Mollier diagram and performance coefficients.

Refrigeration system with control panel and circuit fluid

 

DSC for Datalogging and Supervisory Control, is an additional module for LabVIEW offers the communication capabilities between PCs and hardware / real-time OPC. It is thus possible to design in LabVIEW (HMI / SCADA) monitoring and recording data networks PLCs software.
LabVIEW: supervisor of sand quality control
LabVIEW is used in this system to program a supervisor controlling the quality of sand in a career, before filling the trucks after the results of measurements of quality, we will inject a product to improve the characteristics of the sand to neutralize impurities (such as clay for example) and make them suitable for building. This pilot supervises three PLC (programmable logic controller), which each have a dedicated function: a sampler, a analyser and a divider. Software for the supervising of the sand quality control Programmable logic controller