Siemens SINAMICS S120 - Page 51

Startdrive commissioning tool
2.5 User interface - trace function
Commissioning with Startdrive
Commissioning Manual, 11/2017, 6SL3097-4AA10-0BP1
51
Field/
Mathematical
functions
Description
ABS Absolute value
Calculates the size of a number.
Examples
ABS(5) → 5
ABS(-3) → 3
ABS(-3.14) → 3.14
MOD Modulo
Calculates the residual value of a division
Examples
MOD(5,3) → 2
MOD(3.14,3) → 0.14
REC
Reciprocal value (1/x)
DIFF
1)
Numerical differentiation
Examples
Formula: DIFF($0,SAMPLETIME)
INT
1)
Numerical integration
Examples
Formula: INT($0,SAMPLETIME)
RMS
1)
Quadratic mean
The quadratic mean is given by first adding the squares of all the measured values and dividing them
by the number of measured values. The quadratic mean is the square root of this value.
Examples
Formula: RMS($0,SAMPLETIME)
AV Mean value filter from 1st to 5th order
If the specification of an order is missing, the mean filter of the 1st order is used.
Examples
AV($0,1) → Mean filter 1st order
AV($0,5) → Mean filter 5th order
π
Mathematical constant Pi
AM Arithmetic mean
The arithmetic mean is a moving average over five measuring points.