IDEC SmartRelay functions
IDEC SmartRelay Manual
165
Gain and offset parameters
Please note the information on gain and offset parameters in
Chapter 4.3.6.
Parameter p (number of decimals)
Does not apply to the display of On, Off and Ax values in a
message text.
Timing diagram A: Function with negative difference
∆
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 Q is set or reset, depending on the set (On) threshold
and difference value (
∆
). The function automatically calcu-
lates the Off parameter: Off = On +
∆
, whereby
∆
may be
positive or negative. See the calculation rule below.
Q
O
n
Ax
Off = On +
∆
Q
Off = On +
∆
Ax
On
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