IDEC FL1E SmartRelay - Manual (Page 189)

IDEC SmartRelay functions
IDEC SmartRelay Manual 175
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 
Q
O
n
Ax
Off = On +
Timing diagram B: Function with positive difference 
Q
Off = On +
Ax
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.