Description

The DS200SDCCG1A is a Drive Control Card designed and manufactured by General Electric for use in Excitation Control Systems as part of the EX2000 series. The SDCC, which acts as the main processor board, contains the electronics that control the EX2000. It has three microprocessors that are 16-bit, dual-ported and RAM-connected, along with associated circuitry. Additionally, it features general-purpose interface circuitry that can be connected to other circuit boards to create various excitation systems, and manages the exciter and customer I/O. Additional processing power is gained by using two external dual-ported RAMs.

The SDCC is an electronic controller card that utilizes interface circuitry to connect with other boards and provide a range of AC and DC motor drive configurations. The interface circuitry manages, processes, and controls the signals for drive, motor, and customer input/output. When used in TC2000 applications, additional tasks are performed with the aid of the three primary microprocessors and the interface circuitry. These microprocessors include the Drive Control Processor (DCP), Motor Control Processor (MCP), and Co-motor Processor (CMP).

The DCP utilizes an 80C186 microcontroller (U1) that can handle both digital and analog input/output, it has many built-in peripheral features like direct memory access (DMA) controller, timers/counters, an interrupt controller, wait-state generators, and address decoding for chip selection. The DCP software is used for user interfaces, external regulating loops such as speed and location, and system-level operations.

The MCP uses a microcontroller based on 80C196(U21) that features high-speed, conventional, analog, and digital I/O, timers/counters, and a watchdog timer. The MCP software includes motor/technology-specific operations like dc phase control, ac motion control, and ac general purpose, as well as inner loops like current regulators.

For more advanced motor control algorithms that MCP is not capable of handling, the CMP uses a TMS32002 signal processor (U35) that conducts math-intensive operations. This processor is only used when the drive requires extra processing power and only its EPROM and MCP/CMP dual-ported RAM is exposed to the CMP interface.

The SDCC card has five memory chips that make up the onboard software for the DS215SDCC card: one EEPROM (U9) holds field-adjustable settings, and four EPROMs (U11, U12, U22, and U23) have factory-programmed configuration data. These memory chips are located in sockets on the SDCC card.