8273-140 2301D - Digital Load Sharing and Speed Controls

Description

The Woodward 2301D Load Sharing and Speed Controls series controls load sharing and speed of generators driven by diesel or gaseous engines. The 2301D is a microprocessor-based digital control designed to include the functions of and be compatible with 2301A load sharing controls. The 2301E provides load sharing and speed control of generators being driven by diesel or gaseous engines. With built-in flexible configuration software, application variations can now be selected using an external computer (PC). Changing the application to accommodate engine speed range, gear teeth, and selection of forward or reverse acting is simply a matter of software setup. The 2301E controller is backward compatible with existing 2301D products, since it has the same footprint and mounting configuration. The new controller insures the ongoing availability of a proven, versatile product with enhanced features: - Separate RS-232 and RS-422 serial ports, both with 9-pin connectors - Additional status LEDs for power and RS-422 communications - Fault data logging capability with 16 seconds of data collected every 10 milliseconds on the event of a shutdown, peak speed and load detection - Low-current PWM output for driving Woodward’s L-Series, F-Series, P-Series and PISC actuators - New terminal blocks accommodate additional I/O, with a majority of the terminals located in the same position as the 2301D models. - Major compliance certifications - Engine / generator or pump applications - Multiple dynamics - Manifold Air Pressure (MAP) limiter - Torque limiter - Low-speedsensing functionality - Remote speed & load reference - Soft load transfer - Automatic idle-to-rated switching - Load rejection / load pulse option - Idle droop function - Optional Modbus® serial communications - Adaptive speedsensing algorithm - Two serial ports - Data-logging capability - 2301E ToolKit service tool or Control Assistant programmable - Ordinary or Hazardous Location chassis

New PID Algorithm and Adaptive Speed Sensing Filter  The PID was changed to allow the 2301D to better control slow and medium speed engines.  The speed sensor, as it measures speed, will only send an output to the PID with a new speed only if the engine speed has actually changed. This helps in control of slow speed engines.  The adaptive speed sensor learns or adapts to any anomalies in the gear teeth, torsionals, and slow speed firing frequency.  There are now three ways of selecting the method of speed sensing:  Speed Sensor Function 1 is used for medium and high-speed engines. Typically use this speed sensing type for MPU frequencies of 1000 Hz. and above. The MPU gear is divided into 16 pieces; therefore the speed is sensed and updated once every 1/16th of a full engine revolution.  Speed Sensor Function 4. The speed is sensed on every timing pulse. This function is specifically designed to give readings at low speeds. Speed is calculated by using only two inter-tooth time intervals. This function measures the time between each tooth and stores the two most recent measurements. This block samples and averages these two measurements each time the block executes and uses the average to calculate speed.  Speed Sensor Function 5 is specifically designed with an adaptive rotational speed-sensing filter. This filter will give stable speed sensor readings for: – Low and medium engine speeds. – Engine torsional frequencies caused by engine firing frequencies or various engine loads. – Noisy MPU signals caused by run out in the gear, irregular shaped gear teeth or irregular shaped holes in the flywheel.  There is no correlation between the PID settings of the different software’s.

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