The project involves the complete recording system and temperature control level in two silo in company ‘s facilities in 1st Industrial Area of Volos. The measurement of temperature is around the height of the silo and therefore have placed 5 sensors Pt 100 three treatments each in protective tubes in different locations-altitudes. In each silo is located 3 of these tubes and thus measure 15 temperatures over the height. These thermometers are suitable for measuring temperature from -20oC to 80oC accompanied by the appropriate standard for measuring temperature in grane silos. Also placed two level transmitters guided microwave technology, which is ideal for measuring materials in silo since is not affected by noise and dust and continuously measure the level even during filling. It should be noted that all instruments used are connected to the PLC through Barriers and bear the appropriate proof protection. The entire system is controlled by the PLC, which is connected to a computer, which tracks and records all real-time measurements. Also, from the PC allowing calibration of analog signals and the history of alarms. The scalability of the system is virtually unlimited in terms of both stations PLC and PC, which can be integrated into the system, and the number of signals that can be integrated into the SCADA. The system is in operation since June 2007.
The work included:
- Design and construction of an automation board
- Supply and installation of instrumentation
- Programming and installation of PLC (Mitsubishi)
- Programming and installation of HMI (E – Designer)
- Installation SCADA