 Standard PC with SINAUT Micro SC (routing and OPC server) and WinCC flexible (visualization) |
 SIMATIC S7-200 CPU 224 XP: Distributed controlling
|
 MD720-3: Establishment and maintenance of the GPRS connection, communication to SINAUT Micro SC
|
Highlights:
Economically realizing bidirectional data communication between all stations with SINAUT Micro SC.
The OPC server integrated in SINAUT Micro SC transparently provides all process data of the remote station; the general interrogation of the data can be realized by the central station.
All remote stations feature teleservice functionality for service purposes, messages are automatically transferred to the service staff by SMS.
Thanks to quad-band modem, GSM mobile service providers with GPRS network can be taken advantage of worldwide.
GPRS and Internet secure short transmission times, are always online and only the transferred data volume is charged.
By using standard Micro Automation products, automation solutions offer flexibility to grow with ever increasing requirements.
Automation Task:
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.
 Stormwater Overflow: - Flow rate measurement of water influx - Measuring the filling level of the overflow structure - Overflow measurement - Automatic pumping of basin content to the discharge treatment plant - Operating hours count of the pumps - Monitoring overflow structure and dry run of the pumps |
 Inspection Shaft: - Flow rate measurement of waste water influx - Measuring the filling level of the overflow structure - Automatic pumping of basin content to the discharge treatment plant - Operating hours count of the pumps - Monitoring overflow structure and dry run of the pumps - All measuring data are to be buffered locally with real-time stamps and non-volatilly, until they have been sent to the Central Station successfully and could be archived there. - A trigger in the Central Station causes the "Inspection Shaft" Remote Station to send an SMS to a telephone number specified by the Central Station |
Automation Solution:
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 “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.
Central Station
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.
Startup Code
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.