Eurotherm Drives 590 DRV Digital, Product Manual

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App. A - 1
590 DRV Digital DC Drive Product Manual
A
Appendix A Technical Description
Appendix A TECHNICAL DESCRIPTION
This appendix lists the controller features and specifications and provides a description of the controller terminals.
CONTROL CIRCUITS
Control circuitry is fully isolated from main power supply. A 16-bit microprocessor performs the majority of the
control functions in the 590 DRV Digital drive. External digital and analog I/O terminal communicate directly with
the drive microprocessor. RS422 serial communication which provides access to all drive parameters for computer
interfacing is available as an option.
Functions performed by the drive's microprocessor include:
• Current and speed loop processing
• Alarm recognition and first fault indication
• MMI display and keypad
• LED diagnostics
• Thyristor firing algorithms
• RS422 communication via intelligent peripherals (P1 and P2 ports)
• RS232 communication (P3 port)
• Speed and Current loop signal processing and setpoint summing and scaling.
• Digital to analog output via 10/12 bit D/A convertor
• Analog to digital conversion
POWER CIRCUITS
The 590 DRV Digital drive provides DC armature control by either a fully regenerative (four quadrant), two-pulse
thyristor bridge or a non-regenerative (two quadrant), two-pulse thyristor bridge.
Each type of bridge includes suppression to limit the rise of volts across the thyristor, thus reducing the risk of false
triggering and keeping the maximum applied voltage within the thyristor rating limits. The four quadrant bridge is
configured to provide regenerative capability and reverse speed and torque operation.
The motor field rectifier is a half-controlled, full wave thyristor bridge circuit which can provide a fixed field voltage
supply or field current regulation with field weakening.
OVERVIEW OF FEATURES
Certification All 590 DRV models rated through 300 HP are Underwriter Laboratory (UL ® ) approved for
use in the United States and Canada
Control Action Fully Digital
Fully isolated from power circuitry
Software configurable through Man Machine Interface (MMI) or through independent
Windows™ compatible software package ConfigEd Lite
Advanced PI with fully adaptive current loops for optimum dynamic performance
Self-tuning current loop using Autotune algorithm
Adjustable speed PI with integral defeat and adaptive gain profiling
Process PID for loadcell or dancer position control
Winder control blocks
Field regulation and weakening
Speed Control Armature feedback with IR compensation (standard with each drive)
Analog tachometer generator feedback option
5701 Microtach (plastic fiber optic) feedback option
5901 Microtach (glass fiber optic) feedback option
Wire-ended electrical encoder feedback option
Speed Range 100 to 1 typical when using tachometer generator feedback.