5.3.9 [351] Differentiator (D-element)
Type Function
Type Function
I1 %
Differentiation quan-
tity
O1 %
dt
I 1d
1 PO 1 ×=
I2 - -
O2 % inverted output = -1
I3 - -
P1 % Derivative action time in ms
I4 b Master Reset
P2 - -
Description:
The input value at I1 is differentiated.
The derivative action time indicates how long a linear ramp must rise until it has the same value
as the output of the differentiator.
dt
I 1d
1P-O2O1 ×==
If an integrator and a differentiator are connected in series, a p-element is obtained with ampli-
fication V = Td/Ti.
If, for example, the output value is limited in the case of a jump at the input, the limited value
will be output longer.
In the case of a jump at the input, the jump height/sampling time is assumed as the ramp gra-
dient.
As long as status TRUE is present at I4 (Master Reset), the output value O1 is 0.
Note:
Percentages [%] have two decimals.
For example: Value 12345
IN
= 123.45% = 1.2345
5.3.10 [360] Absolute value function
Type Function
Type Function
I1 % Input value
O1 %
I 1O 1 =
I2 - -
O2 % inverted output = -1
I3 - -
P1 - -
I4 b Master Reset
P2 - -
Description:
The absolute value of the input value at I1 is calculated. The output value at O1 is always posi-
tive.