Chapter 1. General Information; Introduction; Application - Woodward 723PLUS Technical Manual

Manual 26482
This manual describes the Woodward 723PLUS Digital Marine Speed Control for
two-engine mechanical torque sharing with using LonWorks
The 723PLUS Digital Marine Speed Control is designed to control clutching
functions and to regulate the speed and load of diesel engines in dual-engine
marine applications that require mechanical torque sharing. The applications
include mechanically combined two-engine operation for main propulsion,
including those with flexible couplings (see Figure 1-2).
Features include:

Clutch control and permissive logic

Soft loading and unloading

Mechanical torque sharing by matching torque sensor inputs

Advanced speed-sensing algorithms

Firing torsional filtering

Start fuel limiting

Torque sensor failure mode which retains torque sharing

Single-throttle operation for both engines during clutched operation

Redundant control LON

Watch Window communications port
Inputs include:

Two magnetic pickups (MPUs) or proximity switches for sensing engine
speed, capable of providing redundant speed signals

1–5 Vdc remote speed-setting input

4–20 mA torque sensor input

1–5 Vdc remote speed input

Eight discrete inputs (contact inputs) for Run/Stop, Clutch Request, Clutch
Position, Maneuvering Speed, and Alarm Reset.

Redundant Control LON channels to perform mechanical torque sharing and
communicate essential control status to the mating control for proper
clutching and loading operations.
Woodward
Chapter 1.
General Information

Introduction

Application

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*—LON and LonWorks are trademarks of Echelon Corporation
723PLUS Digital Marine Control
®
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