TECHNOALPIN M 20 AT, Руководство пользователя

Страница: 9 / 37

TechnoAlpin M20
- 8 -
3. AUTOMATIC REGULATION
Automatic regulation is accomplished through the sensor set, the control unit and the valve cards. The snow
machine sets itself according to the given environmental conditions to produce the required quality in snow.
If an automatic Hydrant of the type E-Motor, Hydromat or Hydromat 2000 is installed, the snow machine can also
set the water pressure independently to a required operation pressure.
3.1
THE SENSOR SET
The sensor set serves for fixing the humid bulb temperature and possesses 2 sensors, which can measure the air
temperature from
–
30°C to +30°C and the relative air humidity from 0 to 100%. The output measurement signal
ranges between 4 and 20 mA .
The sensors are installed in a measuring station directly on the snow machine and deliver their values directly to
the control unit, which then in turn calculates the humid bulb temperature. This humid bulb temperature forms the
basis for the snow production in the automatic operation.
Besides this, the water temperature and water pressure are measured on the jet ring. The values serve to
influence the condition of the jets and to regulate the water quantity. All sensors send their information to the
control unit, which works on the data.
The water pressure will be measured from 0 to 60 bar and converted into a measurement signal between 4 and
20 mA; the water temperature will be measured from
–
10°C to +30°C, and converted into a signal between 4 and
20 mA.
3.2 THE PU-080 CONTROL UNIT AND PU-79-P KEYBOARD
With the M20 AT snow machine control unit and keyboard are 2 units, which are linked through a CANbus. The
control unit is a programmable controller unit and has the functions of reading data, storing data and working on
read analog value. The control unit, to which the different sensors are connected, calculates the energy content of
the air. This calculated value will be corrected with the water pressure. A further correction will be made based on
the required snow quality. The result of the calculations results in the required amount of water leading to the
correct opening of the jets. As well as this, the control unit continually supervises the proper function of the M20.
The control unit receives the environmental data from the sensors and the set parameters from the keyboard.
Each switching process is checked and in the case of an error the corresponding error report appears on the
display and if necessary the machine will be halted. The control unit has 16 digital inputs/outputs, 6 further analog
inputs and 2 serial ports:
The RS 422-interface works in the (ATASS) network and the RS 232-interface serves for serial communication
with a PC.
Closing of hydrants
Closing of valves
Turbine downwards
Turn to the right