GENERAL INFORMATION – Control System
The Control System is a high-performance system using the latest development in marine control technology. This system is capable to control single engine and twin-engine vessel installations,from one or more control stations.
The available features of the system are as follows:
• Heavy Duty Indoor and Outdoor Control Heads
• Single or Twin-Screw Control
• Adjustable Shift and Throttle Delays
Setup & Calibration
The system setup and calibration can be maintained through adjustable trim pots or a software.
SYSTEM COMPONENTS – Central Processing Unit (PLC)
PLC monitors all input information from the Control Heads and their associated switch panels, the Actuator position indicators and the Synchronizer inputs. The PLC also controls and positions the Actuators and communicates with the Stations.
The circuitry is housed in a heavy-duty enclosure designed to prevent dust and moisture intrusion.
All units are not waterproof and therefore should not be immersed in liquid
or washed. This unit should also not be welded, beaten, smashed or dropped.
All connections to the PLC are hardwired into pluggable connectors on the PLC board.
• Throttle Output
The PLC has three different Throttle outputs: Electro/mechanical Actuator,
4 – 20 mA or -10V DC – +10V DC
As the Station Control Head Lever is advanced through the Throttle portion of its travel, the PLC output increases proportionately to increase the engine speed.
• CPP Output
The PLC has two standard CPP valves outputs: Electro/mechanical CPP Actuator or an Electric CPP.
For the CPP output, when the Station Control Head Lever is moved to the forward or reverse position, the PLC repositions the CPP accordingly.
STATION CONTROL HEADS
The Station Control Heads let the operator interact with the PLC in the following manner:
• The ship’s operator sends instructions to the PLC through control Handles, buttons and HMI
• The PLC sends feedback to the ship’s operator through indicator lamps and HMI
• The Control Heads connect to the main controller, over the distributed control network, through a shielded twisted pair data cable. The Control Heads are manufactured from top quality non-corrosive materials to provide for a long life and an attractive appearance.
The Station Control Heads are available in several types. The indoor Control Heads can be illuminated and installed with a chrome or black epoxy finish. The outdoor Control Heads are waterproof on the top side only, capable of withstanding wet weather conditions and can be supplied with a chrome or
black epoxy finish. The bottom of the Control Head must be protected from the weather.
CPP & Throttles
The Control Heads operate through approximately 80 degrees of travel from each side of the center neutral position. The first 40 degrees per side operate
the CPP and the remaining 40 degrees per side operate the Throttles. The PLC scales the Pitch position only.
Purpose The purpose of an Actuator is to operate the CPP or Throttles, as they all require mechanical positioning
Working With The PLC repositions the Actuators by sending electrical signals to their the PLC drive motors. The corresponding movements of the Actuators are feed back
to the PLC by a gear operated potentiometer to complete the control loop.
During a power failure, the CPP are self-released and the actuator return to the spring zero position due to its mechanical structure.
The mechanical override can be used to operate the lever during a power failure.
Power requirements for the Electropneumatic Electronic Control System are as follows:
• 220 V AC power supply – 10 amps maximum
• 24 V DC supply from emergency
Power Switch Two sources of power must be provided a primary source and a secondary (Customer Supplied) source. A three-position switch capable of handling the system current must be installed next to the main station, usually the wheelhouse station, to allow the operator to select either the primary power, the secondary power or, in an emergency, the POWER OFF / SYSTEM RESET position.