Application Manual CDA3000
A-25
Appendix C Glossary
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Characteristic
data set (CDS)
A user/application data set contains two character-
istic data sets for expanded adaptation to the move-
ment task. A characteristic data set comprises a
selection of parameters, but not all the parameters
available in the inverter module.
Closed-loop
control
The controlled variable is recorded, compared
against the reference input variable and adapted
accordingly to the reference input variable by means
of a mathematical relation. Characteristic is a con-
trol loop with feedback of the output variables to the
input variables.
Control deviation Difference between controlled variable and refer-
ence input variable. If the deviation is equal to zero,
the output variable of the controller remains at its
quiescent value.
Control deviation The negative control deviation xw is termed control
deviation x
d
.
Control difference x
d
=-x
w
=w-x
Control deviation The negative control deviation is termed control
deviation x
d
.
x
d
=x
w
=x-w.
DC braking Feed of a direct current into the motor, causing it to
brake. The resultant braking energy is converted
directly into heat in the motor. The braking power is
lower than when a braking resistor is used on the
inverter.
Delta voltage Effective nominal value of the outer conductor volt-
age of a three-phase AC system
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Driving profile
generator
The driving profile generator contains the general
ramp generator and the table-supported ramp gen-
erator. The ramp generators form a driving profile
which is run through to attain the frequency refer-
ence.
Driving set A driving data set contains a frequency reference
and an assigned acceleration or deceleration ramp
which, when the driving set is selected from a table,
is set to attain the frequency reference in the table-
supported ramp generator.
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