Special Functions

 

V1MaxRuck

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.

Einph. On   (only in operating mode Synchronous Vector)

Determination of angle offset in synchronous machines. 

Auto Tuning

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.

Motortest   (only in operating mode Synchronous Vector and Open Loop)

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.

 

Load.Meass Iq Emty

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.

Load.Meass Iq Load

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!

Load.Meass Enable

Enabling the function. After the calibration, the analogue load compensation must be enabled by setting parameter Enable to 1.

 

 

Info

For more details, please refer to the VVVF controller manual.

 

 

 

Version 002 / Date: 17.09.2007