If modulation is deactivated, value zero is always displayed.
The display of ru80 is only valid in closed-loop operation with activated modu-
lation.
In addition, no special functions such as DC braking, identification, etc. may
be active.
The display is only conditionally usable for special motors (IPM and synchro-
nous reluctance). In open-loop operation or other state there is no valid value
for ru80.
The load display does not work in v/f mode, since the torque is the basis of all cal-
culations.
If the motor data or the available currents change due to saturation, heating or sim-
ilar, the torque limit and thus one of the reference points for the load calculation will
also shift.
For IPM and synchronous reluctance motors the display can only be used condi-
tionally. Since the torque depends on both current components Id and Iq, which are
changed by the control during operation, the reference torque can change perma-
nently.
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