IDEC SmartRelay functions
4.4 Special functions list - SF
IDEC SmartRelay Manual
182
Timing diagram B: Function with positive difference
Functional description
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 is set or reset, depending on the set (On) threshold and difference value ( ). The
function automatically calculates the Off parameter: Off On , whereby may be positive
or negative. See the calculation rule below.
Calculation rule
hen you set a negative differential value , the On threshold Off threshold, and 1if
the actual value Ax On or 0 if the actual value Ax Off.
See the timing diagram A.
hen you set a positive differential value , the On threshold < the Off threshold, and
1, if On 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.
View in programming mode (example):
View in parameter assignment mode (example):
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