IDEC FL1E-H12RCA User Manual page 189

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 
Off = On +
Timing diagram B: Function with positive difference 
Off = On +
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) thresold
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
When you set a negative differential value , 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 , the On
•
threshold < the Off threshold, and Q = 1, if:
On  actual value Ax < Off.
See the timing diagram B.
IDEC SmartRelay Manual
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O
n
Ax
Q
On
Ax
Q
IDEC SmartRelay functions
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