User guide

Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05 617
5 Function blocks
5.195 L_TbRateAction - rate action with limitation
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Function
The input signal is differentiated by means of the parameterised rate time constant T
V
and added
to the input signal.
• The differentiation of the input signal can be switched off by setting the rate time constant T
V
lower than the task cycle time. In this case the differential component is zero and the input sig-
nal is output unchanged to the output.
• When the rate time constant T
V
is higher than the task cycle time, the following step response
is the result:
[5-149] Step response when the rate time constant > task cycle time
C04055: Rate time constant T
V
dnOut
t
T
Cycle
T
Cycle
1+
T
V
1