
Operating Instructions SWT-2000 DYNALCO
18
6.7.7 Math Function
Go to <Configuration>, <Math>.
Math function is an additional input available for System Limit.
The following Math functions may be constructed.
S1 – S2
S2 – S1
Subtraction of speed values
S1 / S2
S2 / S1
Division of speed values
100% x (S1-S2)/S2
100% x (S2-S1)/S1
Percentage difference
Variance (S1)
Variance (S2)
Variance
Acceleration (S1)
Acceleration (S2)
Speed value acceleration
S1
S2
The speed values are fed through
e.g. for the Math function.
Percentage difference
1
)12(100
n
nn −×
n: Speed
Variance
2
1
2
)(
1
1
∑
=
−
−
=
j
i
ix
xx
j
S j = 100
Acceleration
altFlankeSFlankeS
alt
tt
n
t
v
a
11
11
−
−
=
Δ
Δ
=
n: Speed
If the variance for S1, S2 or Analog input needs to be calculated, the measurement time must be set to 5ms
or higher.
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