IDEC SmartRelay Series - Page 175

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
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com