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The Code is implemented in accordens to the requirments given in the  function description. Quickly summerized it describes the following,

• Survey and report the temperature
• Sound  an alarm after 30 mintues if the temperature deviates more than +-1C away from the setpoint.
• In case of an alarm, turn on fans to ensure a well ventilated facility

The Code for the Temperature sensor is based on its technical data, where 0v = -30C[NOT VERIFIED]  which linearly scales to 10v = 200C[NOT VERIFIED]. This means that linear interpolation is utilized to scale the input voltage too a output in celsius.

Linear interpolation is performed with the following function,

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This means that the inputs needs to be,

• sensor_reading:REAL;
• set_point_in_c:REAL;
• alarm_delay:TIME;
• max_temp:REAL;
• max_temp_in_volts:REAL;
• min_temp:REAL;
• min_temp_in_volts:REAL;

And the outputs needs to be,

• temp_read_in_c:REAL;
• alarm_high:BOOL;
• alarm_low:BOOL;

With the following internal variables,

• alarm_since_trig:TIME;
• alarm_high_trig:BOOL;
• alarm_low_trig:BOOL;
• alarm_high_trig_0:BOOL;
• alarm_low_trig_0:BOOL;

The coded implementation looks like this,

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