Dynamic Voltage Pre-Control; Control Functions; Intelligent Current Limits - BONFIGLIOLI Agile Operating Instructions Manual

Parameter descriptions
7.8.1

Dynamic voltage pre-control

605 Dyn. Voltage Pre-Control
The
Dyn. Voltage Pre-Control
(parameter
Operation Mode
The output voltage value resulting from the V/F characteristic is changed by addition of the calculated
voltage pre-control.
Parameters
No. Description
605 Dyn. Voltage Pre-Control
7.9

Control functions

With the control function the control reactions can be set up fitting to the application.

7.9.1 Intelligent current limits

573 Operation Mode (intelligent current limits)
The current limits to be set according to the application avoid inadmissible loading of the connected
load and prevent a fault switch-off of the frequency inverter. The function extends the current control-
ler available in the control system. The overload reserve of the frequency inverter can be used opti-
mally by means of the intelligent current limits, in particular in applications with dynamic load
al-ternations. Parameter
current limit. The parameterized rated motor current or the reference current of the frequency invert-
er is synchronized as the limit value of the intelligent current limits.
In the control method according to V/f-characteristic (setting 110 of
current limits take effect to the current limit controller. The intelligent current limits are active only in
the case of an active current limit controller.
In the field-orientated control (setting 410 or 610 of
current is limited by the intelligent current limits.
573
Operation Mode
0 - Off
1 - Ixt
10 - Tc
11 - Ixt + Tc
20 - Motor Temp.
21 - Motor Temp.+ Ixt
30 - Tc + Motor Temp.
31 - Tc + Motor Temp. + Ixt
In the operation modes with overload reserve (Ixt) there is a reduction of the output current when the
threshold value is exceeded, with a distinction being made between long and short-term overload
reserve. After the short-term overload (1 s) has been used up, the output current is reduced to the
long-term overload current matching the present switching frequency. After the long-term overload
current has been used up (60 s), the output current is reduced to the rated current which also de-
pends on the switching frequency.
If the output current has already been reduced due to the fact that the long-term overload has used
up, the short-term overload is no longer available even if it has not been used up beforehand. The
defined overload reserve (Ixt) of the frequency inverter is available again after a power reduction
lasting 10 minutes.
Control functions
605 accelerates the control behavior of the current limit controller
610) and of the voltage controller (parameter
Min.
0%
573 defines the threshold to the activation of the intelligent
Operation Mode
The function is switched off.
Limitation to the overload of the frequency inverter (Ixt).
Limitation to the maximum heat sink temperature (T
Operation mode 1 and 10 (Ixt + T
Limitation to the motor temperature (T
Operation mode 20 and 1 (T
Operation mode 10 and 20 (T
Operation mode 10 and 20 (T
Factory setting.
Setting
Max.
200%
Configuration
30) the maximum torque-forming
Configuration
Function
).
C
Motor
+ Ixt).
Motor
+ T ).
C Motor
+ T + Ixt).
C Motor
213
06/2013 Operating Instructions
670).
Operation Mode
Fact. sett.
100%
30) the intelligent
).
C
).
Agile