Find the largest and smallest value over a time period.
The input over which the minimum and maximum value is to be recorded is connected to the AI input.
The lowest value since the last reset is output at AQmin and the highest value since the last reset is output at AQmax.
If the input R is activated then a new calculation period starts, AQmin and AQmax will be set to the current value of AI.
In this example the highest and lowest value over the day is recorded.
The outdoors temperature sensor is connected to AI input and the ‘Pulse for day’ time input is connected to the R input. This resets the block at midnight every day and starts a new calculation period.
At the AQmin output and AQmax output are memory flags to use the highest and lowest temperature elsewhere in the program.