Basic Setting - KEB COMBIVERT F4-F Applications Manual

Encoder Interface
Cable length

6.9.5 Basic Setting

Adjustment of encoder line
number
(dr.25, dr.30)
Encoder track change
(dr.29, dr.34)
Speed sampling time
(dr.40)
Encoder resolution
(dr.28)
© KEB Antriebstechnik, 1999
All Rights reserved
To achieve an unobjectionable function following cable lengths should not be exceeded.
Precondition for it is that the supply voltage at the rotary encoder is within the specified
tolerances.
The encoder lines should not be longer than 50 m. If longer cables are needed,
please contact KEB.
Further information can be taken from the documentation of the respective
manufacturer.
Prior to start-up the inverter must be adapted to the encoder(s) which is/are used.
With this parameter the encoder line number is adjusted to the connected encoder
within a range of 256...10000.
• dr.25 for encoder interface 1
• dr.30 for encoder interface 2
If you find that during start-up in controlled operation the actual and setpoint speed
have different signs it can be an indication for a wrong connection of the incremental
encoder. If possible the wiring should be corrected. Should this involve too much
effort then you can achieve a rotation reversal of encoder 1 by means of dr.29. The
effect corresponds to a change of the A and B tracks of the incremental encoder.
With parameter dr.34 it is possible to achieve a track change of encoder 2.
This parameter defines the time over which the speed average is determined. At that
the resolution of the speed detection is defined simultaneously.
dr.40 Sampling
time incremental encoder with 2500 pulses
0 0,5 ms
1 1 ms
2 2 ms
3 4 ms
4 8 ms
5 16 ms
When using other line numbers:
Speed resolution =
When connecting sine / cosine encoders the accuracy of the position recording is
improved by activating the high-resolution (dr.28 = 1). For incremental encoders with
rectangular signals the adjustment must be dr.28 = 0.
Name: Basis
KEB COMBIVERT F4-F
Functional Desription
Speed resolution with the use of an
12 min -1
6 min -1
-1
3 min
-1
1,5 min
-1
0,75 min
-1
0,375 min
Specified speed resolution x 2500
Line number
Date
09.08.00
ANTRIEBSTECHNIK
(factory setting)
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