DS200SDCCG3A - Drive Control Card

SPECIFICATIONS:

Part Number: DS200SDCCG3A
Manufacturer: General Electric
Series: Mark V
Product Type: Drive Control Card
Number of channels: 12
Common Mode Voltage Range: +5 V dc
Maximum Lead Resistance: 15 Ohm
Analog output current: 0-20 mA
Operating temperature: -30 to 65 °C
Size: 8.26 cm high x 4.18 cm
Frequency: 50 or 60 Hz
Repair: 3-7 Day
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
Manual: GEI-100222

FUNCTIONAL DESCRIPTION:

DS200SDCCG3A is a Drive Control Card manufactured and designed by General Electric as part of the Mark V Series used in GE Speedtronic Turbine Control Systems. The SDCC contains the primary control circuitry and software for a drive or exciter. The SDCC consists of three 16-bit microprocessors and associated circuits coupled via dual-ported RAM. (Dual-ported RAM [DPR] is RAM configured as memory arrays that can be independently and simultaneously accessed by two microprocessors.) The SDCC also includes interface circuitry that connects with other boards to form various types of ac and dc motor drives. The interface circuitry controls and processes drive and motor signals, and customer I/O. (The interface circuitry and three main microprocessors are used for other functions in TC2000 applications.) The SDCC's three main microprocessors are:

• Drive Control Processor (DCP). An 80C186 microcontroller (U1) with numerous built-in peripheral functions and uses both digital and analog I/O.

• These functions include address decoding for chip selects, wait-state generators, an interrupt controller, timer/counters, and the direct memory access (DMA) controller. DCP software consists of user interfaces, outer regulating loops (such as speed and position), and system-level functions.

• Motor Control Processor (MCP). An 80C196 microcontroller (U21) with high-speed I/O, conventional digital I/O, analog I/O, timer/counters, and a watchdog timer. MCP software consists of inner loops such as current regulators, and motor/technology-specific functions such as dc phase control, ac motion control, and ac general purpose.

• Co-motor Processor (CMP). A TMS320C25 digital signal processor (U35) that performs math-intensive functions for motor control algorithms is too complex for the MCP. The SDCC uses this processor and its associated circuitry only when the drive requires additional processing capability. The CMP interfaces only to its EPROM and MCP/CMP dual-ported RAM.

• The DS200SDCC card includes onboard software stored in five memory chips: four EPROMs (U11, U12, U22, and U23) that contain configuration data programmed at the factory and one EEPROM (U9) that contains field-adjustable parameters. These memory chips are contained in sockets on the SDCC.

CONFIGURABLE HARDWARE:

The SDCC includes configurable hardware that must be set correctly for the application:

• Berg-type (manually movable) hardware jumpers, identified by a JP nomenclature.
• Wire jumpers, identified by a WJ nomenclature.

These jumpers are used for factory tests or user application options. Most of the jumper selections have been factory-set. The test data sheets supplied with each controller (in the drive/exciter door pocket) indicate these factory-set positions. Table 2 lists the jumper descriptions, showing the default setting first.

SOFTWARE CONFIGURATION TOOLS:

Any adjustment, downloading, or replacement of software on the SDCC requires the use of the ST2000, GE Control System Toolbox, or LynxOS Drive Configurator. The applicable drive/exciter instruction book, an appropriate PC, and the ST2000, GE Control System Toolbox, or LynxOS Drive Configurator instruction book are also required for any software adjustments.

• ST2000 is a DOS-based set of software tools for configuring GE DIRECTO-MATIC 2000 control equipment.
• The GE Control System Toolbox is a Windows-based set of software tools for configuring GE DIRECTO-MATIC 2000 control equipment.
• The LynxOS Drive Configurator is a set of software tools for configuring GE DIRECTO-MATIC 2000 control equipment. It is designed to run on a personal computer (PC) operating with the LynxOS operating system.

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FREQUENTLY ASKED QUESTIONS:

What is the purpose of the dual-ported RAM in the Drive Control Card?

The dual-ported RAM (DPR) is used to allow the microprocessors to access memory independently and simultaneously. This allows for more efficient communication between the processors, as the DCP, MCP, and CMP can all access and share memory in parallel, improving processing speed and coordination within the control system.

What types of motor control functions does the Drive Control Card support?

The Drive Control Card supports both AC and DC motor drives. Its motor control capabilities include functions like current regulation, speed control, position control, and other motor-specific control features such as dc phase control and ac motion control. These features optimize the operation of motors in turbine control applications, ensuring smooth and efficient performance.

How is software stored on the Drive Control Card?

The Drive Control Card contains onboard software stored in five memory chips: four EPROMs and one EEPROM. The EPROMs store configuration data programmed during manufacturing, while the EEPROM stores field-adjustable parameters that can be modified as needed. These memory chips are socketed on the card, making it easier to replace or upgrade the software when required.