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6
11
KEB COMBIVERT F4-F
8
Name: Basis
17.06.99
Chapter
Section
Page
Date
©
KEB Antriebstechnik, 1999
All Rights reserved
Functional Description
Positioning Module
The position feedback for the positioning module can be made by way of the system
feedback (encoder input 1) or over a second encoder (encoder input 2):
Pc.16
Position Feedback by
0
Encoder input 1 (X4)
1
Encoder Input 2 (X5)
If the encoder input 2 is used as feedback then all position settings refer to this
encoder. 65536 increments at the position setting correspond to one revolution of this
second encoder.
The parameters for the precontrol profile Pd.5 to Pd.7 always refer to the encoder
input 1 (system feedback / responsible for speed control).
A change of the parameter
values is only possible in
„noP“ state.
In Pd.11 it is selected whether the position setpoint value is adjusted absolute or
whether it should be proceeded relative to the momentary position. At successive
relative positioning cylces the new position is calculated on the basis of the momentary
position
setpoint value
, i.e. position errors are not added up.
Pd.11 Procedure
0
absolute
1
relative
After carrying out a positioning command, a „position reached“ signal can be set by
way of a digital output (see chapter 6.3). This message is given out, when the precontrol
profile is finished and the drive is in the target window. This target window is adjustable
in Pd.12.
Target window = setpoint position- target window size...setpoint po target
window size
The positioning process can be interrupted as follows:
–
Switch off positioning via digital input
–
Reset-input (falling edge)
–
Angular deviation ru.27 > LE.28...LE.31
(see chapter 6.3.12 „Digital in-/outputs“)
6.11.7 Relative/Absolute
Positioning
(Pd.11)
6.11.8 Target Window
(Pd.12)
6.11.9 Cancel
positioning
6.11.10 Selection of
Endocer Input
for the Position
Feedback
(Pc.16)