NORD Drivesystems BU0710 - Manual (Page 6)

NORDAC SK 700E manual Posicon special extension
6 BU 0710 GB
1 General
NORDAC vector frequency inverters are voltage source d.c. link inverters with microprocessor electronics
designed to control the speed of three-phase motors.
Providing an incremental encoder on the motor and/or an absolute encoder on the output shaft along with
using the optional SK_XU1_POS Posicon positioning card will enhance the standard components so as to
constitute a drive system capable of performing positioning tasks in a highly precise manner.
• 252 positions can be programmed to be approached by the unit controlled
• Position control in the destination window; the unit controlled will retain the desired position
even with substantial fluctuations of the load.
• Distance calculation ensures that the driven assembly is moved into the destination position
accurately and within the shortest possible time
• Control options not only provide for setting positions but also for pre-setting the step widths
required for moving from one position to the next (position increments)
• Also possible: transmission of setpoint positions via a field bus interface.
Designed to be plugged into the control board, the add-on positioning card fits into the standard housing of the
frequency inverter so that the overall size of the device is not increased.
The positioning card is equipped with a processor of its own which will determine the speed setpoint the
inverter will have to ensure.
The parameters which are required for distance calculation are inserted into the existing inverter menu
structure as an additional menu group.
The position setpoints can be applied to the digital inputs which are additionally provided on the positioning
card, or transmitted via the USS protocol or another field bus system respectively.
By switching from one parameter set to another, the operator may quit speed control in order to access
distance calculation or position control, or vice versa.