Siemens SPS starter kit 6ED1057-3BA10-0AA8 6ED1057-3BA10-0AA8 Scheda Tecnica
Codici prodotto
6ED1057-3BA10-0AA8
Reference material
5.3 Special functions
LOGO!Soft Comfort Online Help
Operating Instructions, 06/2014
Operating Instructions, 06/2014
261
Timing diagram A: Function with negative difference Delta
Timing diagram B: Function with positive difference Delta
Description of the function
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)
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 (Delta).
(Ax * gain) + offset = actual value of Ax.
Output Q is set or reset, depending on the set (On) threshold and difference value (Delta).
The function automatically calculates the Off parameter: Off = On + Delta, whereby Delta
may be positive or negative. See the calculation rule below.
Calculation rule
● When you set a negative differential value Delta, 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 Delta, the On threshold < the Off threshold, and
Q = 1, if:
On ≤ the actual value Ax < Off.
See the timing diagram B.
Particular characteristics to be noted when configuring
Refer to the help on analog block parameters in the Information on analog value processing