High-performance applications with extremely fast control algorithms

– Cycle times ranging from 100 μs (microseconds) for fast control loops to several seconds for long-term transient operation require specialised control equipment.

Dual-core processor units combine these high-speed controls with low-speed process control tasks normally performed by stand-alone PLC (Programmable Logic Controller) units.

The dual-core processor unit takes the technology a step further by combining these high-speed control and low-speed process control tasks normally performed by a separate PLC (Programmable Logic Controller) unit.

The AC 800PEC embedded system is unique in the field of industrial process controllers for its robust and flexible architecture and integrated standard communication functions.

The AC 800PEC is the ultimate way to fulfil high demands.

The AC 800PEC offers a unique combination of functions for demanding applications:

– Short cycle times, down to 100 μs

– High processing power

– Fast communication and input/output via optical links

– Programming tools:

– System engineering using ABB Control Builder’s IEC61131-3 language.

Compact and specialised

– Product and control development using MATLAB®/Simulink® dcs-sis.com for model-based design, easily bridging the gap from simulation to implementation

– Fully integrated with ABB Ability™ System 800xA

– Innovative and flexible use of FPGAs to include protocol and application functionality in the device without creating an additional processor load

– Optical communications

– Industrial grade hardware with no moving parts

– Long life and easily upgradable

– Robust file-dependent system, unaffected by power failures

Arc Furnace Applications

– Stable arc detection

– Different control modes (constant current, constant power or constant resistance)

– Quick connection to Power Quality Systems (PQS)

Includes ELREG (electrode regulation; control of the anode hydraulic system) function:

– Manual electrode control (analogue or digital)

– Electrode quick lift function (with or without separate quick lift valve)

– Automatic arc extinguishing function

– Automatic re-arc function

– Adaptive electrode control according to furnace conditions or heating stage

– Stacked integral control circuit

– Voltage fluctuation measurement (stability index calculation)

– Arc detection/protection of the furnace roof

– Protection of the furnace top from arcs during arc extinguishing

– Hydraulic oil pressure monitoring and electrode protection

– Collapse detection

– High-pressure detection

– Control logic for backpressure valves

– Voltage monitoring to ground

– Voltage monitoring at the top of the furnace

– Automatic raising of the electrode after a furnace shutdown command (distance or position selectable)

– Shut-off valve control

– Electrode speed limitation to protect electrode and arm

– Future functions

– Automatic proportional valve linearisation