BONFIGLIOLI Agile Operating Instructions Manual page 124

620
Operation mode
1 - Magnetisation
Magnetisation +
2 -
current impression
Magnetisation +
3 -
IxR-compensation
Magnetisation +
current impression
4 -
+ IxR-
compensation
Magnetisation +
12 - current impression
with ramp stop
Magnetisation +
current impression
14 -
with ramp stop +
IxR-compensation
621 Amplification
622 Integral time
In setting
Configuration
current controller is available for the starting behavior. The PI controller controls the current impres-
sion via parameter
Starting current
ler can be set via parameters
Parameters
No. Description
621 Amplification
622 Integral time
Agile
Operating Instructions
In this operation mode, the
netization is impressed into the motor after enable. The output frequen-
cy is kept at zero Hz not exceeding the
780. After this time has expired (at the latest), the output frequency
follows the adjusted V/f characteristic.
Operation mode 2 includes operation mode 1. After the
780 has elapsed (at the latest), the output frequency is
formation time
increased according to the set acceleration and the starting current is
impressed. If the output frequency reaches the value set with the pa-
rameter
Frequency limit
There is a smooth transition to 1.4 times the frequency limit to the set
V/f characteristic. As from this operating point, the output current de-
pends on the load. Factory setting.
Operation mode 3 includes operation mode 1. When the output frequen-
cy reaches the value set with parameter
crease of the output voltage by the IxR compensation becomes ef-
fec-tive. The V/f characteristic is displaced by the portion of voltage
which depends on the stator resistance.
In this operation mode, the current set with the parameter
781 is impressed into the motor for magnetization
ing flux-formation
after enable. The output frequency is kept at zero Hz not exceeding the
Maximum flux-formation time
latest), the output frequency is increased according to the set accelera-
tion and the starting current is impressed. If the output frequency
reaches the value set with the parameter
623 is withdrawn. There is a smooth transition to the
Starting current
V/f characteristic, and a load-dependent output current is obtained. At
the same time, the increase of the output voltage by the IxR compensa-
tion becomes effective as from this output frequency. The V/f character-
istic is displaced by the portion of voltage which depends on the stator
resistance.
Operation mode 12 contains an additional function to guarantee a start-
ing behavior under difficult conditions. The magnetization and starting
current impression are done according to operation mode 2. The ramp
stop takes the current consumption of the motor at the corresponding
operating point into account and controls the frequency and voltage
change by stopping the ramp. The
intervention of the controller by displaying the message "RSTP".
In this operation mode, the functions of operation mode 12 are extend-
ed by the compensation of the volt-age drop across the stator re-
sistance. When the output frequency reaches the value set with parame-
624, the increase of the output voltage by the IxR
ter
Frequency limit
compensation becomes effective. The V/f characteristic is displaced by
the portion of voltage which depends on the stator resistance.
30 = "110 - IM: sensorless control" (V/f control of asynchronous motor), a
623. The proportional and integrating part of the current control-
621 and
Amplification
Min.
0.01
1 ms
124
06/2013
Starting behavior
Current during flux-formation
Maximum flux-formation time
624, the
Starting current
Frequency limit
780. After the time has elapsed (at the
Frequency limit
Controller status
622.
Integral time
Setting
Max. Fact. sett.
10.00 2.00
30000 ms 50 ms
Parameter descriptions
781 for mag-
Maximum flux-
623 is withdrawn.
624, the in-
Current dur-
624, the
275 signals the
Operational Behavior