Lenze EDS4900U-REG - Manual (Page 186)

Configuration
7-95
48XX/49XXSHB0399
Code Name Possible settings Code Name
Lenze Selection Info
[C198*] Enable
actual
speed filter
0 -0- Filter not active
-1- Filter active
C199* Time
constant
act. speed
filter 10ms 8ms {1ms} 100ms
Stop!
Another time constant in the speed control circuit can lead to instability of the
drive!
7.6.6 Excitation characteristic
In basic configuration, the DC controller uses an internally stored excitation
characteristic to detect armature current set-values and to adpat the control
parameters of the field current controller in field weakening operation.
The influence of the internal excitation characteristic can be switched off via code
C235. If this is the case, the further control process is based on operation with
rated excitation (
F
rated
) i.e. neither the gain of the armature control circuit nor the
adaptation of the control parameters for the field current controller are adjusted.
The external selection of the excitation characteristic is possible by assigning an
analog signal source using codes C145/C146.
4900Str082
C 2 3 5
C 0 6 3
I
m a x
C 0 2 2 / C 0 2 3
C 3 1 0
C 3 1 1
C 3 1 2
C 3 1 3
C 3 1 4
0
1 I
F a c t
1 0 0 % ( o f f )
I
s e t
C 1 4 6 / C 1 4 7
C h a n g e o v e r
f o r e x t . e x c i t a t i o n
c h a r a c t e r i s t i c
S p e e d
d e p e n d e n t
c u r r e n t
l i m i t a t i o n
I n p u t
I - c o n t r o l l e r F
a d a p t a t i o n
o f c t r l . p a r a m e t e r s
C 0 5 6
s e t
i n %
o f M
m a x
M
FIG 7-55 Signal-flow chart (section) for the selection of the excitation characteristic
Code Name Possible settings Code Name
Lenze Selection Info
[C235*] Excitation
characteristic
0 -0- internal excitation characteristic active
-1- internal excitation characteristic not active
With C235= -1-, the control process is
based on operation with rated excitation.
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