ANTRIEBSTECHNIK
6
4
9
KEB COMBIVERT F4-F
Name: Basis
Functional Description
Set Value and Ramp Adjustment
Chapter
Section
Page
Date
©
KEB Antriebstechnik, 1999
All Rights reserved
16.03.99
SP.4
SP.5
SP.6 (SP.4)
SP.7 (SP.5)
SP.8
SP.9 (SP.8)
Fig. 6.4.7
Setpoint motor potentiometer
Setpoint setting : through activation of digital inputs
At SP.0 = 15 and 16 negative setpoint values are internally set to 0
and the direction of rotation is adjusted digital by way of parameter
SP.3 or terminal forward and reverse.
At SP.0 = 17 the direction of rotation is defined through the sign of
the setpoint.
Adjustments and method of operation of the motor
potentiometer function are described in Chapter 6.8
„Special functions“.
Motor potentiomer-setpoint setting
+n [U/min]
-n [U/min]
Maximum speed
Minimum speed
Minimum speed
Maximum speed
Input dec. active
Input inc. active
100 %
of SP.26
-100 %
of SP.26
Setpoint addition
(AUX function
An.13)
With the adjusted setpoint limits (SP.4...SP.7) the speed range 0% ( ^
= minimum speed) up to 100%
( ^
= maximum speed) is also defined for the AUX-internal setpoint signal.
1. If the digital rotation setting (parameter SP.3 or terminal strip) is selected with parameter SP.0 the
adjusted setpoint signals are added up sign-correct. The result forms the valid setpoint speed.
Negative values in the result are set to zero.
Example:
Setpoint signal at REF1:
+ 3 V
Setpoint signal at AUX (REF2): - 2 V
Valid setpoint speed:
+ 1 V
corresponds to 10% of the speed range
with
preset digital direction of rotation
2. If with parameter SP.0 the rotation setting is selected through the sign of the setpoint, then the
adjusted setpoint signals are added up sign-correct. The sign of the result defines the direction of
rotation and the sum of the result represents the valid setpoint speed.
Example:
Setpoint signal at REF-internal: + 3 V
Setpoint signal at AUX-internal: - 5 V
Valid setpoint speed:
- 2 V
corresponds to 20% of the speed range
with
direction of rotation reverse
3. Parameter SP.0 = 18 (direct analog setpoint setting), with this setting the AUX-function has no
effect. The setpoint is defined only by the setpoint signal at REF1.
Setpoint setting : -10V ... +10V (REF1)
At SP.0 = 18 the direction of rotation is defined only by the sign of
the setpoint.
The setpoint is limited only by the absolute maximum speeds (SP.8
/ SP.9).
Functions and restrictions concerning the direct setpoint
setting are described in chapter 6.4.2.
+n [U/min]
-n [U/min]
Absolute
Maximum speed
3000 U/min
-3000 U/min
Absolute
Maximum speed
Direct analog setpoint setting
REF1 [V]
REF1 [V]
10V
100
%
-10V
-100 %
Fig. 6.4.8
Setpoint analog direct