Lenze DSD - Manual (Page 466)

18 Drive dimensioning messages
18.8 Inverters
466
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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18.8.4 Max. thermal utilisation >100 %
18.8.5 Control mode not suitable for hoist drive
18.8.6 Inverter designed as double axis
Warning!
The max. thermal utilisation of the inverter is xxx %. Thus the limit value of 100 % is exceeded.
Cause Effects Possible remedies
The inverter is operated at a too high
continuous current.
The inverter switches itself off via the
device monitoring (Ixt).
• Select a greater inverter.
• Improve the utilisation of the in-
verter voltage range:
• If the motor is not operated at
rated speed, it might be possi-
ble to improve the utilisation of
the voltage range by adapting
the gearbox ratio, and thus re-
duce the current required.
Note!
The selected control mode xxx is not suitable for safely operating the hoist.
Cause Effects Possible remedies
With the selected control mode, the
drive is not able to safely provide the
required torque over the entire con-
trol range continuously.
The hoist may crash. Select other control modes.
Note!
The motor output of the inverter is a double axis.
The design in this DSD project only refers to one output of this double axis.
The second output can be dimensioned in a second DSD project.
Cause Effects Possible remedies
For double axes, DSD checks every
axis individually. It is not checked
whether both parts of the double
axis are also used in the DC-bus sys-
tem.
Not all parts of the double axis are
used or the double axis is used too of-
ten.
Check manually.