Lenze 8200 - Control Functions; Speed Range (Fdmin, Fdmax)

Configuration
8200SHB0199
7-15
7.5 Control functions
7.5.1 Speed range (f
dmin,
f
dmax)
Code Name
Possible settings
IMPORTANT
Lenze Choice Info
C010 Minimum field
frequency
820X 0.00 0.00 {0.05 Hz} 480.00
821X/822X/
824X
0.00 0.00 {0.02 Hz} 480.00
C011 Maximum field
frequency
820X 50.00 30.00 {0.05 Hz} 480.00
821X/822X/
824X
50.00 7.50 {0.02 Hz} 480.00
Function The speed range required for the application can be selected via the input of field frequencies f
dmin
and f
dmax
:
- f
dmin
corresponds tothe speed at 0 %speed setpoint selection.
- f
dmax
corresponds to the speed at 100 % speed setpoint selection.
Adjustment Relation between field frequency and synchronous motor speed:
n
Nsyn

f
dmax
ô 60
p
n
Nsyn
Synchronous motor speed [min
-1
]
f
dmax
Max. field frequency [Hz]
p No. of pole pairs (1, 2, 3, ...)
Example: 4 pole asynchronous motor:
p=2,f
dmax
=50Hz
n
Nsyn

50 ô 60
2
 1500 min
 1
Important - With the setting f
dmin
>f
dmax
the field frequency is limited to f
dmax
.
- With setpoint selection via JOG values, f
dmax
acts as limitation.
- f
dmax
is an internal normalisation variable:
- Use the LECOM interface only for important modifications, when the controller is inhibited.
- Observe the maximum speed of the motor!
- f
dmin
is only effective:
- With analog setpoint input.
- With the motor potentiometer function ”DOWN”.
Special features
820X
- With field frequencies f
d
> 240 Hz:
- The overcurrent switch-off can be activated.
821X/822X/824X - With field frequencies f
d
> 300 Hz:
- Avoid chopper frequencies < 8 kHz.
- The display value of f
dmin
and f
dmax
can be relatedtoan application datum using C500 and
C501.
fd
C011
(fdmax)
C010
(fdmin)
0 % 100 %
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