Liftket STAR LIFTKET VFD, Инструкция по эксплуатации, дополнительный лист

Страница: 8 / 13

8
3.2 Reduce Speed Mode
In Reduce Speed Mode, the maximum achieved lifting speed can be reduced to 5 Hz. As a result, a cautious settling of the
load or a gentle approach to the top hook position is possible.
Lifting in Reduce Speed Mode
Operation of button Lifting Function
Press on 1 st stage Lifting with minimum frequency according to A062
Pressing down to 2 nd stage Increasing the frequency or lifting speed as long as 2 nd stage is pressed
Change back from 2
nd
stage to 1
st
stage Reduce the frequency setpoint and thus the lifting speed
Releasing the button Immediate stopping of the lifting movement without a ramp due to the brake being en-
gaged
Table 3: Operation of button Lifting in Reduce Speed Mode
Load measuring in Reduce Speed Mode
When passing through the 50 Hz setpoint, a load measurement takes place. The 50 Hz is "frozen" for about 300 ms. The
result of this load measurement determines the maximum frequency or maximum possible lifting speed:
Load Maximum frequency [Hz]
Full load 50
Without load 100
Partial load 50-100
Table 4: Maximum frequency and alteration rate when lifting in Reduce Speed Mode
Note:
The load measurement at 50 Hz during the lifting process takes place only once if it has not
been stopped in the meantime.
Lowering in Reduce Speed Mode
Operation of button Lowering Function
Press on 1
st
stage Lowering with minimum frequency according to A062
Pressing down to 2 nd stage Increasing the frequency or lowering speed as long as 2 nd stage is pressed
Change back from 2 nd stage to 1 st stage Reduce the frequency setpoint and thus the lowering speed
Releasing the button Immediate stopping of the lowering movement without a ramp due to the brake being en-
gaged
Table 5: Operation of button Lowering in Reduce Speed Mode
The maximum lowering speed is regulated via the intermediate circuit voltage. When the limit value of the intermediate cir-
cuit voltage is reached, the frequency is not further increased during lowering. The larger the load, the sooner this point will
be reached.
Load Maximum frequency [Hz]
Full load 50
Without load 90
Partial load 50 - 90
Table 6: Maximum frequency when lowering in Reduce Speed Mode
www.hoistandwinch.co.uk