2 optimisation of operating modes, Commissioning, Boost – Lenze 8240 HVAC Series User Manual
Page 48
Commissioning
5-8
UOOuhäáã~_^NMMO
5.4.2
Optimisation of operating modes
5.4.2.1
Optimisation of V/f characteristic control with constant
V
min
boost
Codes required
Code
Name
Possible settings
IMPORTANT
Lenze
Selection
Info
C015 V/f rated frequency
50.00 7.50
{0.02Hz}
960.00
C016 V
min
setting
0.00
0.00
{0.02 %}
40.00
C021 Slip compensation
0.0
-50.0
{0.1 %}
50.0
Adjustment
1.If necessary, select V/f
characteristic (C014).
2.Select V/f-rated frequency
(C015).
D
The V/f-rated frequency determines the slope of the V/f characteristic and has considerable
influence on the current, torque and power performance of the motor.
D
An internal mains voltage compensation compensates deviations in the mains during operation.
They therefore do not have to be considered for the setting of C015.
Adjustment
Calculate the frequency to be set under C105:
`MNRxeòz =
QMMs
s
к~нЙЗ гзнзк
xsz ⋅
o~нЙЗ гзнзк СкЙимЙеЕу xeòz
C014 = -2-
Linear characteristic
C014 = -3-
Square-law characteristic (e. g. for pumps, fans)
hPRKMMSR
1 0 0 %
0
0
1
f d
f d N
m i n
0
0
1
f d
f d N
m i n
1 0 0 %
V
V
V o u t
V o u t
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