Siemens Logo! Manual page 193

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
O
n
n
Off = On +
Ax
Q
Timing diagram B: Function with positive difference
n
Off = On +
On
Ax
Q
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) thresh-
old and difference value (
calculates the Off parameter: Off = On +
may be positive or negative. See the calculation rule below.
LOGO! Manual
A5E00380835-01
n
). The function automatically
n
LOGO! functions
n
n
n
, whereby
185