In a compact housing, the AP 257/22 weather station (GPS) contains all sensors, the evaluating electronic sys-tem and the bus coupling unit.

It measures wind speed, brightness and temperature, recognizes twilight and precipitation and receives the GPS (Global Positioning System) radio signal for date and UTC-time (UTC - Uni-versal Time Coordinated).

In addition to date and time, all measured values can be transmitted on the bus in EIS5 (DPT 9) format and re-spectively monitored on up to 3 limit values.

Limit values can be selected as parameters or as communication objects. For each day the maximum wind speed, the maximum brightness and the minimum and maximum outside temperature can be recorded and transmitted.

The angles (azimuth and elevation) at which the sun shines can be calculated as needed from date, time and the location coordinates entered and likewise transmit-ted via the bus.

Using the “Safety” parameter window, in addition to wind alarm, frost alarm and precipitation alarm, a total of up to 8 alarm or failure messages can be combined via a logical OR-function to a “Safety” communication object, which in the case of alarm results in the sun pro-tection moving into its safety position.

In addition 4 AND-gates and 4 OR-gates with 4 inputs each are available for further logic operations.