13.10 Frequency and speed limitaons
By
liming the maximum output frequency to ± 599 Hz, the devices are not sub-
ject to the export restricons of the "EC-Dual-Use Regulaon" (EC 428/2009).
This applies to devices supplied from the middle of the year 2015. For certain
applicaons, the supply of devices with the current maximum output frequency
of ± 1999 Hz. If required, get in touch with your Lenze contact person.
Output frequency
The output frequency of the i700 servo inverter is limited to a maximum value, the amount of
which corresponds to the lower of the two following values:
chop
lim lim max_ Geräte
f
f oder f f
8
= =
lim
f Maximum output frequency
f
chop
Switching frequency 0x2939
f
max_device
Maximum device output frequency 0x2835:001, depending on the device type ± 599
Hz or ± 1999 Hz
Due to the restricons by the "dual use regulaon" (EC 428/2009), values higher than + 599
Hz to + 1000 Hz or - 599 Hz to - 1000 Hz do not increase the output frequency. Please observe
the deadband occurring in this case.
Speed setpoint
If servo control is used, the speed setpoint is limited depending on the number of motor pole
pairs:
n
lim
Speed limit value
f
lim
Maximum output frequency0x2939
zp Number of motor pole pairs
•
If the speed se
tpoint is limited, bit 1 ("Speed: Setpoint 1 limited") or bit 5 ("Speed: Set-
point 2 limited") is set in the Lenze status word 0x2831.
•
The behaviour corresponds to the behaviour which is shown when the set maximum
speed 0x6080 is reached.
•
The sequence is: limit the speed to 0x6080 rst, then limit it to the speed limit value n
lim
.
Frequency setpoint
If V/f characterisc control is used, the frequency setpoint is limited in addion to the speed
se
tpoint.
•
If the fr
equency setpoint is limited, bit 10 ("Output frequency limited") is set in the Lenze
status word 0x2831.
Conguring the motor control
Fr
equency and speed limitaons
276
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