DS200FCGDH1BAA - Gate Distribution and Status Card

SPECIFICATIONS

Part No.: DS200FCGDH1BAA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Product Type: Gate Distribution and Status Card
Availability: In Stock
Series: LCI

Functional Description

DS200FCGDH1BAA is a Gate Distribution and Status Card developed by GE. It is a part of its LCI (Load Commutated Inverter) series. This interface board plays a crucial role in managing the operation of 6-pulse, phase-controlled, non-reversing bridges. It integrates advanced functionality to ensure precise control, monitoring, and diagnostics in industrial applications.

Key Functions

• SCR Firing Management: The FCGD receives Silicon-Controlled Rectifier (SCR) firing information from the DS200DSPC (Digital Signal Processor Card). It ensures accurate control of gating signals for each bridge leg.
• Cell Status Monitoring: Collects multiplexed cell status signals from each leg of the bridge. Decodes and interprets this data to monitor system health and performance.
• Bridge Feedback Processing: Receives and scales bridge feedback signals, including Voltage, Frequency, Current Sends the processed feedback to the DSPC board for further analysis and control.
• Diagnostic Information: Returns diagnostic information via the VME backplane, aiding in system troubleshooting and optimization.

Design and Construction

• The FCGD board conforms to the 6U VME size standard, measuring 9.2 x 6.3 inches. It is designed to fit seamlessly into a VME rack alongside other boards, such as the DSPC.
• Features a six-layer structure with surface-mounted devices (SMDs) on both sides, ensuring high-density circuitry and efficient use of space.
• Mounts in the same VME rack as the Digital Signal Processing Card (DSPC), allowing streamlined communication and minimizing latency.

Operational Workflow

• The board generates SCR firing instructions and sends them to the FCGD. The FCGD decodes these signals and distributes gating signals to control the operation of each bridge leg.
• Feedback signals such as voltage, frequency, and current are received from the bridge. Multiplexed status signals from the bridge legs are processed and sent to the DSPC board for system analysis.
• Diagnostic information and feedback data are transmitted back to the DSPC via the VME backplane for centralized monitoring and troubleshooting.

System Reset

The system reset signal plays a vital role in initializing the board's operation. During power-up or a hardware reset, this signal resets all registers on the board to their default initial values. By doing so, the system ensures it starts from a known, stable state, avoiding potential issues caused by residual data or errors from prior operations. This feature is crucial for maintaining reliability and consistency in industrial environments where the board operates as part of a critical system.

System Heartbeat

The system heartbeat serves as a periodic signal generated by an electronic component to confirm its operational status. This functionality is supported by the heartbeat register on the FCGD board.

• When the VME host CPU writes to the heartbeat register for the first time, the board-level heartbeat begins counting at the same rate as the system clock.
• A green LED labeled "IMOK" (I am okay) lights up on the board's front, visually indicating the component’s health.

If the count in the heartbeat register exceeds its design limit (typically 8 milliseconds), the system triggers a safety response:

• The IMOK light turns off.
• The gating is disabled, halting the board’s operations.

A hard reset is required to clear this condition, ensuring system integrity before resuming functionality.

Firing Commands

The FCGD board uses fiber-optic firing signal transmitters to control the gating of six cell strings in a bridge. This process is governed by the firing mask register, which contains six entries corresponding to the six cell strings.

• Operational Workflow: The VME host CPU writes data directly into the firing mask register over the VME bus connection. The FCGD board can activate up to six fiber-optic transmitters simultaneously, ensuring precise control over the bridge’s firing mechanism.
• Flexibility: This design enables efficient management of firing signals and allows real-time adjustments by the host CPU for system optimization. These features ensure that the FCGD board operates with high precision, reliability, and responsiveness, critical for managing 6-pulse phase-controlled bridges in industrial applications.

The WOC team is always available to help you with your LCI requirements. For more information, please contact WOC.

Frequently Asked Questions

What is DS200FCGDH1BAA?
It is a Gate Distribution and Status Card developed by GE under the LCI series.

What is the function of the System Reset signal?
The System Reset signal initializes all the board's registers to their default values during power-up or hardware resets. This ensures the system starts from a stable, known state, preventing errors from prior operations.

What is the System Heartbeat, and why is it important?
The System Heartbeat is a periodic signal generated by the board to confirm that its components are operational. The heartbeat register begins counting when the VME host CPU writes to it for the first time. A green LED labeled IMOK (I am okay) lights up to indicate the board's health. If the count in the heartbeat register exceeds its limit (e.g., 8 milliseconds), the LED turns off, and gating stops, requiring a hard reset to restore functionality.

What happens if the System Heartbeat fails?
If the System Heartbeat exceeds its design limit The IMOK LED turns off. The gating signals are disabled to prevent unsafe operations. A hard reset is required to resume normal operations.