Description
⚙️ Product Specifications (Datasheet)
| Parameter | Value |
| Model / Part Number | 723PLUS High-Voltage Series (P/N: 8280-1002) |
| Control Assembly P/N | 9906-619 |
| Device Type | Programmable Digital Controller for Prime Mover Speed & Load Sharing |
| Power Supply Voltage | High Voltage Version (90 to 150 VDC or 88 to 132 VAC @ 40 W max) |
| System Compatibility | Compatible with Woodward DSLC Digital Synchronizer & Load Control |
| Key Features | Soft Loading/Unloading, Automatic Breaker Opening, Integral Load Sharing |
| Operating Temperature | -40°C to +70°C (-40°F to +158°F) |
| Housing Material | Heavy-Duty Sheet Metal Enclosure |
| Speed Sensor Inputs | 2 Independent Channels (Magnetic Pickups / MPU or Proximity Sensors) |
| Communication Ports | Dual RS-422 / RS-485 Serial Ports (Modbus RTU / LonWorks) |
🚀 Standard Operating Procedure
- 🛠️ Pre-Start Loop Inspection: Confirm high-voltage power input wiring matches 88–132 VAC or 90–150 VDC limits. Verify terminal connections for MPU speed sensors, DSLC load-sharing lines, and breaker trip interlocks.
- ⚡ Power On Sequence: Switch on the main control power circuit breaker. Confirm front panel status LEDs illuminate and internal microprocessor self-diagnostics pass without error codes.
- 🕹️ Control Mode Selection: Select Local or Remote control mode (Isochronous, Droop, or DSLC Load Control) via external discrete inputs or serial network commands.
- 🏎️ Prime Mover Start Sequence: Initiate the engine start command. The 8280-1002 tracks speed feedback through its speed channels and executes configured acceleration ramps up to rated operational speed.
- 🔄 Synchronizing & Soft Loading: When synchronized via the DSLC, close the generator breaker. The controller smoothly ramps generation load (soft loading) up to the target load setpoint.
- 📉 Soft Unloading & Auto Breaker Trip: Upon receiving a stop signal, the controller automatically ramps generator load down (soft unloading) to a minimal power threshold and issues an automatic breaker trip command.
- 🛑 Engine Cooldown & Stop: Allow the engine to complete its programmed cool-down cycle before de-energizing fuel solenoids completely.
⚙️ Parameter Configuration Guide
- 💻 Connect a PC running Woodward Watch Window software or attach a Handheld Programmer (HHP) to the 9-pin serial service port.
- 🔑 Log in using the authorized security password level to unlock parameter tuning and configuration menus.
- 📑 Navigate to setup menu blocks, including Speed Dynamics, DSLC Interface Scaling, Soft Load/Unload Ramp Rates, and Automatic Breaker Trip Thresholds.
- ✏️ Adjust parameter values to match system requirements (e.g., set soft load ramp rates in kW/s, adjust droop percentage, or tune auto-breaker trip power thresholds).
- 💾 Select “Save Values” to store all updated settings into non-volatile EEPROM memory prior to disconnecting software.
🔄 Manual / Automatic Mode Switching
- 🖐️ To Select Manual Mode: Actuate the designated local/manual discrete contact switch or set a manual override in Watch Window. Manual mode grants operators direct local authority over speed setpoints and fuel limiters.
- 🤖 To Select Auto Mode: Toggle control input contacts back to Automatic / DSLC mode. The controller automatically maintains speed loops, responds to grid frequency variations, and balances power sharing across the DSLC network.
❓ Frequently Asked Questions (Q&A)
- ❓ Q: What is the main difference between P/N 8280-1002 and P/N 8280-1001?
💡 A: P/N 8280-1002 is the High-Voltage input version (88–132 VAC / 90–150 VDC), whereas P/N 8280-1001 is the Low-Voltage DC version (18–40 VDC). Both share the same Control Assembly 9906-619 software capabilities.
- ❓ Q: How do the soft loading/unloading and auto breaker opening features work together?
💡 A: Soft loading prevents power grid shock by ramping load up slowly after paralleling. Soft unloading ramps power down smoothly before automatically tripping the generator breaker at a low kW limit, preventing reverse power conditions.
- ❓ Q: How does this high-voltage controller interface with the Woodward DSLC?
💡 A: It interfaces directly with the Woodward DSLC (Digital Synchronizer and Load Control) via dedicated terminal circuitry, accepting speed and load bias commands for automatic generator synchronizing and kW/kVAR load allocation.
