Early Warning System

When the PP15 RTU is in online mode, the values measured by the sensors are provided to the Modbus slave handling the communication in real time. The SCADA server in the control center polls the data via GPRS or satellite every 15 minutes (more often during heavy rains). The PP15 device is used to cyclically monitor the status of the modem and switches to offline mode automatically if the network fails.
When the PP15 is in offline mode, the measured data is time-stamped and stored to flash memory every 15 minutes. Once communication is reestablished, it switches to recovery mode automatically. When the PP15 is in recovery mode, the large blocks of data in flash memory are
sent to the control center. Once all data has been transferred successfully, the PP15 switches back to online mode.

The SCADA server
In the control center, all of the data is collected in an MS SQL database and evaluated using mathematical models. The following measures are taken depending on the risk of a potential mudslide:

• First warning level: Exercise caution
• Second warning level: Prepare for evacuation
• Third warning level: Evacuate to secure zones

These early warning systems are also being used to help mitigate the effects of flooding from Thailand's rivers and to monitor water pipes in Bangkok. These effective measures are used as the basis for protecting the population.

Large reference installation in Thailand.
Ask us for details.