Loosening cabin from safety catch. If
you enter 1 for the travel speed V1, a set value jump will be prescribed. As a
result, a jerk-like torque will be built up and the cabin can be loosened from
the safety catch more easily. Additionally, the maximum VVVF controller current
is output. This function must be activated again after each attempted start,
i.e. the value for V1MaxRuck is reset to 0 after each attempted start.
Determination of angle offset in
synchronous machines.
Automatic measurement of motor
characteristic. Enter 1 to activate a motor characteristic measurement. This
enables an optimum torque utilization of the machine. Please carry out this measurement only after consulting
RST-Elektronik.
Automatic test of motor connection
upon the start of drive. If you enter a 1, the connection to the motor is
checked upon each start of a drive. In this way, wiring defects or open
contactors are detected immediately.
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.
AVERDI GmbH in Berlin is a supplier
of analogue load measurement systems.
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.
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.
Calibration with load in cabin
The procedure is the same as
described in "Calibration with empty cabin". You only have to use
parameter Iq Last.
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!
Enabling the function. After the
calibration, the analogue load compensation must be enabled by setting
parameter Enable to 1.
For more details, please refer to
the VVVF controller manual.
Version 002 / Date: 17.09.2007