ABB-ASTAT system basics

ABB-ASTAT system basics

ASTAT® is a highly developed, well-proven system for speed controlled heavy-duty motors in cranes and  other heavy industrial machinery. Designed for even the toughest environments ASTAT brings reliable, cost  effective crane control into the computer age.  Using leading edge computer technology, ASTAT now combines advanced control features with comprehensive information and data distribution to enhance performance at all levels.  ASTAT is made especially for high utilisation, designed with higher-grade components and larger margins  than normal industrial drives.  The motor is the torque-producing device of an ASTAT Motion Control system. The electrical power is fed  to the motor from the power bus through the DASD Thyristor Module. The DARA Control System Module  controls the voltage of the DASD Thyristor modules.  The DARA Control System Module controls the voltage and its phase sequence as well as selecting the  best speed-torque characteristic for the motor based on desired and real speed. A tachometer, a pulse encoder or a DADT 100 Feedback Module measures the real speed. The desired speed comes from a  DAPM Cabin I/O Module. For optimisation of torque-speed characteristic an external rotor resistor and  sometimes a contactor are used. The ASTAT system is primary designed for loads that most of the time  moves at full speed. In this normal state the speed control is replaced by full motor voltage.  There are several options to the ASTAT Crane Motion Control program, below is shown a DASG line Overvoltage protection Module.

The Control System Module offers a lot of functions related to the control of the motion. The functions are  introductory described below in the sub-section Motion control for heavy industrial machinery and  more detailed in the rest of this Manual.  The fundamentals of the torque control are found in the sub-section, Motor torque control.

Operation limits  Voltage: Control and Thyristor Modules: Nominal -30% .. Nominal +10%.  Frequency: Nominal -10 Hz .. Nominal +10 Hz  Temperature: -25 degree C cont. w/o heating   +70 degree C cont. for Control System Modules   + 85 degree C cont. for Thyristor Modules with reduced data above 40 / 55 degree C  Isolation EN 60664. Pollution degree 4   250 V AC for Control System Modules   630 V AC for Thyristor Modules  Key data  Control System Module  Control System Module DARA 1001∗ 2 Voltages 115 or 230 V AC 50 / 60 Hz. 1 phase.  2 Thyristor bridges each max. 1100 A  11 RS232 interface for programming/supervision PC and computer control  1 Opto interface for Master-Follower connection  1 Opto interface for Overriding Control connection  1 RS 232 for connection of fault display or others (only on control boards of Generation 2 and later)  17 Digital in, 110 V DC (supplied internally)  8 Digital out  4 Motor PTC inputs  4 Analogue in,  2 Analogue out  2 RS 232 for intelligent transducers  1 Pulse transmitter  4 Rotor connections for speed feedback/ rotor monitoring  2 Remote I/O can be connected  Key data  Thyristor Module  3 Voltage ranges; maximally 530 V, maximally 600 V or maximally 690 V  2 Frequencies; 50 / 60 Hz  10 Currents: 25 A ... 1000 A

Inside each group mostly only a few parameters have to be modified for each installation while the others  can be left as the Normal value suggested or from the company standard of the user. In most cases the  majority of parameters can be left as they are.  It is not only possible to set parameters. A large number of signals are available for daily supervision and  maintenance support as well as for qualified troubleshooting and motion control optimisation. Signals can  either be internal inside a group of functions or between different groups.