9
6
7
9
KEB COMBIVERT F5
Name: Basis
04.05.04
6
Abschnitt
Seite
Datum
©
KEB Antriebstechnik, 2002
All rights reserved
Kapitel
Functional Description
Protective Functions
6.7.4 Dead Time
Compensation uF.18
The dead time compensation optimizes the switch-off times of the power module
semiconductors. The parameter is intended for service purposes only and should not
be changed.
uF.18 Dead time compensation/Mode
0
off
1
on (default)
On switching off the modulation (e.g. on opening the control release or triggering the
DC-brake) the motor induces a voltage which acts contrary to its cause. The Base-
Block time (uF.12 in s) protects the power modules against destruction by blocking
the power modules in this stage. The duration of the Base-Block time depends on the
power stage. During the Base-Block time the display indicates „bbl“. Below the indicated
Base-Block voltage level uF.13 no Base-Block time occurs. The current modulation
grade is indicated in ru.42.
6.7.5
Base-Block Time
(uF.12) and
Voltage Level
(uF.13)
6.7.6
Response to
Errors or Warning
Signals
The following errors or warning signals must not lead automatically to the disconnection
of the inverter. The behaviour can be adjusted by parameters:
Pn.4
Input selection external error
=> Pn.3 Response to external fault
Pn.6
Watchdog time
=> Pn.5 Response to error watchdog
=> Pn.7 Response to limit switch
=> Pn.18 Response to set-warning
=> Pn.66 Response to soft limit switch
At the following signals one can react to the interference additionally by setting a
switching condition:
Pn.9
Level OL-warning
=> Pn.8 Response to OL-warning
Pn.11 Level OH-warning
=> Pn.10 Response to OH-warning
Pn.13 Clearing time E.dOH
=> Pn.12 Response to dOH-warning
Motor protective circuit-breaker (6.7.8)
=> Pn.14 Response to OH2-warning
Pn.17 Level OHI-warning
=> Pn.16 Response to OHI-warning
Input selection
external fault (Pn.4)
In order to trigger an error in the inverter with an external signal, one or several inputs
can be selected for it with Pn.4.
In case of several inputs the sum of their decimal values must be entered.
Bit -No. Decimal value Input
Terminal
0
1
ST (Prog. input „Control release/Reset“)
X2A.16
1
2
RST (Prog. input „Reset“)
X2A.17
2
4
F (Prog. input „Forward“)
X2A.14
3
8
R (Prog. Input „Reverse“)
X2A.15
4
16
I1 (Prog. Input 1)
X2A.10
5
32
I2 (Prog. Input 2)
X2A.11
6
64
I3 (Prog. input 3)
X2A.12
7
128
I4 (Prog. input 4)
X2A.13
8
256
IA (Internal input A)
none
9
512
IB (Internal input B)
none
10
1024
IC (Internal input C)
none
11
2048
ID (Internal input D)
none
With Pn.65 Bit 1 it can be
defined, whether with the
inputs selected here E.EF (with
response from Pn.3) or E.UP
(response from 6.7.3) is
triggered.
