Micro Automation: Wireless Data Communication based on GPRS (MAS 21)
The SIMATIC S7-200 components used in this application example are currently phased out.
This application can be realized as easily and quickly with the new SIMATIC S7-1200. The respective application example with SIMATIC S7-1200 is available here: 39863979
Furthermore, many useful applications with SIMATIC S7-1200 are available here: 35923253
The infrastructure of a wastewater treatment plant contains the substations “Stormwater Overflow“ and “ Inspection Shaft“. Both are supposed to communicate with each other and with a control center. The Internet-based GPRS service, which charges by data volume, should be used as a data transfer medium. The control center should enable central operator control and monitoring.
The automation solution uses the SINAUT Micro SC remote control system with the GPRS modem MD720-3
to visualize process data from the Remote Stations at the Central Station or
to exchange process data between the Remote Stations.
Remote Station “Stormwater Overflow“
The S7-224 controls pump “P1“, which pumps the water of the stormwater overflow structure into the water treatment plant. Pump “ P2“, which can be operated manually via the Central Station, enables pumping the water into a nearby river. All process data are transferred to the Central Station via the GPRS modem MD720-3.
Remote Station “Inspection Shaft“
The S7-224 controller measures the amount of wastewater influx and, in function of the filling level, controls the pump “P3“, which pumps the water into the treatment plant. All process data are transferred to the Central Station via the GPRS modem MD720-3. In the event of a connection disruption, a non-volatile buffer will save all of the process data together with a time stamp until the GPRS connection is active again.
The OPC server SINAUT MICRO SC is used as a platform for data exchange with the Remote Stations. The Central Station communicates with the GPRS nodes via Internet connection. As OPC client, WinCC flexible enables visualization and control of the process data. Furthermore, the values can be written with time stamp into a CSV file.
For the startup we offer you software examples with test code and test parameters as download. The software examples support you during the first steps and tests with your Micro Automation Sets. They enable quick testing of the hardware and software interfaces between the products described in the Micro Automation Sets.
To operate a SIMATIC S7-200 with a MODEM MD720 along with the Telecontrol Server Basic, revised/new block libraries are available under the following link 99522310.
|System manual GPRS/GSM Modem SINAUT MD720-3||23117745|
|SINAUT MICRO SC System manual||23119827|
|Micro Automation Set 5||21063345|
New Option "SOAP" for Webvisualization with WinCC flexible.
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