Operating Instructions ACTIVE06/07 123
06/07 Operating Instructions ACTIVE 123
13.8 Percentage Value Ramps
The percentage value ramps scale the change of the reference value (in percent) for
the corresponding input function. The acceleration and deceleration of the drive are
parameterized via the frequency ramps.
The behavior
Gradient Percentage Ramp 477 corresponds to a function which takes
the time response of the drive system into account. If the parameter is set to 0 %/s,
this function is deactivated and a direct reference value modification for the following
function is obtained.
The default value depends on the parameter
Configuration 30.
Parameter Settings
No. Description Min. Max. Fact. sett.
477 Gradient Percentage Ramp 0 %/s 60.000 %/s x %/s
13.9 Block Frequencies
In certain applications, it is necessary to fade out reference frequencies. In this way,
resonance points of the system as stationary operating points are avoided. The pa-
rameters
1st Blocking Frequency 447 and 2nd Blocking Frequency 448 with the
parameter
Frequency Hysteresis 449 define two resonance points.
A block frequency is active if the parameter values of the block frequency and the
frequency hysteresis are not equal to 0.00 Hz.
The area faded out as a stationary working point by the hysteresis is passed through
as quickly as possible according to the selected ramp for V. If the output frequency is
limited as a result of the selected control parameter settings, e.g. if the current limit is
reached, the hysteresis is passed through with a delay. The behavior of the reference
value can be determined from its direction of movement according to the following
diagram.
Parameter Settings
No. Description Min. Max. Fact. sett.
447 1st Blocking Frequency 0.00 Hz 999.99 Hz 0.00 Hz
448 2nd Blocking Frequency 0.00 Hz 999.99 Hz 0.00 Hz
449 Frequency Hysteresis 0.00 Hz 100.00 Hz 0.00 Hz
internal
reference value
reference value output
f
block
hysteresis hysteresis
f +hysteresis
block
f -hysteresis
block
To Next Page
Loading...
Need help?
General
