6
931
KEB COMBIVERT F5
Name: Basis
04.05.04
6
Section PageDate
© KEB Antriebstechnik, 2002
All rights reserved
Chapter
Functional DescriptionSpecial Functions
6.9.9 Positioning
Function
The positioning function enables the approach of a position with a signal from different
frequencies. The positioning procedure is triggered by disabling the direction of rotation
through an external signal (e.g. through set-changeover). The positioning is executed
correctly only if at triggering the positioning the maximum frequency of the positioning
set is not exceeded and no s-curves are used. During the positioning procedure the
status ‘Positioning’ is displayed (value 83, display ‘POSI’).
In order to always travel the same distance in the case of different frequencies, the
drive continues to run with constant frequency after starting the positioning until the
position is reached with the adjusted deceleration. The frequency-dependent constant
running time is calculated as follows:
t_dec
2 f_max²
t_const = ———————— •
(
——— - f_actual
)
Reference frequency f_actual
t_const: frequency-dependent constant running time [sec.]
t_dec: adjusted deceleration time [sec.]
Reference frequency: 100Hz / 200Hz / 400Hz (dependent on ud.2)
f_max: maximum frequenz [Hz]
f_actual: actual frequency[Hz] on triggering the positioning
With parameter Pn.63 a shifting of the stop position can be adjusted, which entails an
additional constant running time. Thus the shifting of the initiator can be omitted. The
additional constant running time is also frequency-dependent and is calculated as
follows:
Pn.63 • f_max
t_delay = ——————
f_actual
The parameter is not standardized and can be adjusted within the range of 0.01...327.67 s.
The value -1 switches off the positioning function in the appropriate set.
Pn.63 Function
-0,02 Positioning function switched on; no shifting of the stop function;
set changeover during the positioning possible
-0,01 Positioning function switched off (standard)
0,00...327,67 s Positioning function switched on; positioning delay by the adjusted
value, set changeover during the positioning not possible .
With the set activation delay (fr.5) and the set deactivation delay (Fr.6) a waiting
period after reaching the position and/or during set changeover can be adjusted.
Calculation of the frequency-
dependent constant running
time
Positioning delay (Pn.63)
Set activation delay (Fr.5)
Set deactivation delay (Fr.6)
Param. Addr.
min
max
default
ENTER
PROG.
RO
Step
Used Parameters
Pn.63 043Fh - ✔✔ -1 s 326,76 s 0,01 s -0,01 s -0,01 = off; -0,02= abort
Fr.5 0905h - ✔ - 0,00 s 32,00 s 0,01 s 0,00 s -
Fr.6 0906h - ✔ - 0,00 s 32,00 s 0,01 s 0,00 s -
t_delay: additional constant running time [sec.]
Pn.63: positioning / delay [sec.]
f_max: maximum frequency [Hz]
f_actual: actual frequency [Hz] on triggering the positioning
(only at F5-G/B)
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