Timing diagram B: Function with positive difference Delta
Description of the function
The function fetches the analog signal at input Ax.
Ax is multiplied by the value of the A (gain) parameter, and the value at parameter B (offset) is added to
product, i.e.
(Ax ∙ gain) + offset = actual value of Ax.
Output Q is set or reset, depending on the set (On) threshold and difference value (Delta). The function
automatically calculates the Off parameter: Off = On + Delta, whereby Delta may be positive or negative.
See the calculation rule below.
Calculation rule
When you set a negative differential value Delta, the On threshold >= Off threshold, and:
Q = 1, if the actual value Ax > On
Q = 0, if the actual value Ax ≤ Off.
See the timing diagram A.
When you set a positive differential value Delta, the On threshold < the Off threshold, and Q = 1, if:
On ≤ the actual value Ax < Off.
See the timing diagram B.
Setting the Par parameter
The gain and offset parameters are used to adapt the sensors to the relevant application.
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