RST FRC-F Series, Manual

Page: 81 / 140

9.581.140-6
Page:
81
9.7.6.5 Evaluation of an analogue load measuring unit
By evaluating an analogue load measurement signal 0-10V, the VVVF
controller can output a torque even before the brake is opened. This
prevents the drive from turning away.
(load measurement)
In order to enable a load compensation, two calibration measurements are required: One
measurement with empty cabin and one measurement at half load or, even better, at full load. The
VVVF controller carries out the measurement automatically.
9.7.6.5.1 Calibration with empty cabin
Please move the cabin to the middle of the shaft to minimize the error caused by the weight of the
rope.
The measurement is activated by setting parameter
Iq Leer
to 100.
Then issue a restore command - the VVVF controller carries out a load
measurement within the next 3 seconds.
After the measurement, the parameter is set from 100 to the determined
value.
Now the load point for the empty cabin is determined.
9.7.6.5.2 Calibration with load in cabin
The procedure is the same as described in Section 9.7.6.5.1 . You only
have to use parameter
Iq Last
.
9.7.6.5.3 Further information on calibration
For the calibration of the load points, the cabin must be moved to the middle of the shaft in order to
minimize the error due to the weight of the rope.
It is important that the stopping regulator be parameterised such that the cabin movement is balanced
properly at the end of the waiting time (3 seconds). This should be reached after a few hundred
milliseconds. With a stopping regulator setting which is too soft, no load calibration is possible !
9.7.6.5.4 Enabling the function
After the calibration, the analogue load compensation must be enabled
by setting parameter
Enable
to 1.
Load measuring
Iq Leer 100%
----------------------
Load measuring
Iq Last 100%
----------------------
Special functions
Load measuring
----------------------
Load measuring
Iq Leer -46%
----------------------
Load measuring
Enable 1
----------------------