6
9
21
KEB COMBIVERT F5
Name: Basis
04.05.04
6
Section
Page
Date
©
KEB Antriebstechnik, 2002
All rights reserved
Chapter
Functional Description
Special Functions
0
1
Pn.44 Bit 1
fout
>
Pn.48
+
-
+
-
Pn.53: KP
Pn.54: KI
Pn.55: KD
Pn.51: KP
Pn.57: KI
Bild 6.9.6.c Power off controller
Auto. start volt.
Pn.50 Volt. set value
Pn.44 Bit 6,7
Set value selection
2: dep. of f
out
1: Volt. set value
0: Starting voltage
DC link act. value
Pn.45 Start. voltage
yes
no
Voltage set
value ramp
Pn.47 Braking torque
Slip limit
Actual
current-set
value ramp
DC link
controller
CS.1 Ac. value source
2:
Act. current set
value
(calculated)
0,1: Slip controller
(Encoder
interface)
Pn.44 Bit 6,7
Set value selection
3: Braking torque
(Act. current /
slip controlling)
< 3: DC link
controller
act. current/
slip act. value
act. Current/
Slip controller
HSR
Power off controller
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.
Starting voltage (Pn.45)
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).
Auto starting voltage (Pn.46)
Braking torque (Pn.47)
Setpoint DC-link voltage (Pn.50)
F5-B/C