KEB COMBIVERT F5 MULTI Applications Manual page 253

Special Functions
Bild 6.9.6.c Power off controller
Pn.47 Braking torque
Slip limit
f out
no
>
Pn.48
yes
Pn.50 Volt. set value
Pn.44 Bit 1
Auto. start volt. 0
Pn.45 Start. voltage 1
Power off controller
Starting voltage (Pn.45)
Auto starting voltage (Pn.46)
Braking torque (Pn.47)
Setpoint DC-link voltage (Pn.50)
© KEB Antriebstechnik, 2002
All rights reserved
Actual
current-set
value ramp
HSR
Pn.44 Bit 6,7
DC link act. value
Set value selection
Voltage set
2: dep. of f
out
value ramp
1: Volt. set value
0: Starting voltage
In Fig. 6.9.3 the different controls (DC-link voltage, active current and slip control) as
well as the setpoint and actual value sources are represented. The parameter CS.1 is
normally defined by the encoder (see Chapter 6.11) and should not be changed here.
The starting voltage is used as setpoint value source, if the adjustment is Pn.44 Bit 1
= „1" and Bit 6-7 = „0". The starting voltage can be preset wiithin the range of
200...800 volt .
The Auto starting voltage is used as setpoint value source, if the adjustment is Pn.44
Bit 1 = „0" und Bit 6-7 = „0". With automatic starting voltage the DC-link voltage is
measured at „Power-On" and is displayed in ru.68. The auto starting voltage is
determined by Pn.46, which adjusts the measured voltage in percent in the range of
50...90 % (default 80 %) of the measured value.
Serves for the adjustment of the braking torque in the range of 0.1...100.0 %, if the
drive must be stopped as quickly as possible in case of power failure. For this setting
to become effective, Pn.44 Bit 6 and 7 must be set to „3". In this case the DC-link
control is disabled, i.e. it is a pure active current/slip control. The braking torque can
be preset within the range of 0,1...100,0 %. Depending on CS.1 the active current
control or the slip control works.
The voltage setpoint value is used as setpoint value source, if the adjustment is Pn.44
Bit 6-7 = „1". If Bit 6-7 are adjusted to „2", the voltage setpoint value takes effect only
below the restart value (Pn.48), so that the drive still has enough energy for braking
when reaching the minimum output value. On reaching the restart value the starting
voltage is increased over a ramp to the voltage setpoint value.
The setpoint DC-link voltage is adjusted with Pn.50 in the range of 200...800 V. This is
the value to be regulated to. To ensure a safe operation the internal value is limited
down. The value of the DC-link voltage in normal operation plus approx. 50 V adjusts
itself as minimum value. If a braking resistor is connected, the adjusted value may
not lie above the threshold of the braking resistor, else the controller cannot work
(threshold 200V-class: 380V; 400V-class: 740V).
Name: Basis
KEB COMBIVERT F5
Functional Description
CS.1 Ac. value source
2: Act. current set
F5-B/C
value
(calculated)
0,1: Slip controller
(Encoder
interface)
Pn.44 Bit 6,7
Set value selection
3: Braking torque
(Act. current /
slip controlling)
DC link
controller
+
-
< 3: DC link
controller
Pn.51: KP
Pn.57: KI
04.05.04
act. current/
slip act. value
act. Current/
Slip controller
-
+
Pn.53: KP
Pn.54: KI
Pn.55: KD
Date Chapter Section
6 9
6
Page
21