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Siemens FC Smooth Analog Input

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mascalzone
Junior
Junior

Joined: 20 Nov 2016
Posts: 11

Posted: 14/01/2017 19:18 Post subject: Siemens FC Smooth Analog Input

FC Smooth Analog Input

Siemens FC Smooth Analog Input Siemens FC Smooth Analog Input

This function provide to smooth a analog input.
FC5

Code:

The function calculate the smooth value by add S/16 of previous value with (16-S)/16 of actual value the formula used is
Out = ([Smooth_factor]/16)*[Prev_value]+((16-[Smooth_factor])/16)*[Input_value]
S = smoothing factor
X1 = initial value/previous output
X2 = new input from I/O table

Valid entries for S smooth factor
If you want to..... then enter.....
Prevent the smoothing process 0
Provide minimal smoothing 1
provide maximum smoothing 15

Segmento: 1 Timing
This network manage the timing of function
U #CLK
FP #Dummy_bit_1
= #Calc_ON // One-shot clock
UN #Calc_ON //Timng calculation
BEB

Segmento: 2 Formula
This network apply the smoothing formula
L #Smooth_factor
L 1.600000e+001
/R // [Smooth_factor]/16
L #Prev_value
*R // ([Smooth_factor]/16)*[Prev_value]
T #Dummy_real_1
//
L 1.600000e+001
L #Smooth_factor
-R // 16-[Smooth_factor]
L 1.600000e+001
/R // (16-[Smooth_factor])/16
L #Input_value
*R // ((16-[Smooth_factor])/16)*[Input_value]
T #Dummy_real_2
//
L #Dummy_real_1
L #Dummy_real_2
+R // ([Smooth_factor]/16)*[Prev_value] + ((16-[Smooth_factor])/16)*[Input_val
ue]
T #Out_smoothed
T #Prev_value // Save previous value

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