ROLLS-ROYCE CCN 01 & ROLLS-ROYCE SLIO 02 CANMAN CONTROLLER NETWORK

ROLLS-ROYCE CCN 01 & ROLLS-ROYCE SLIO 02 CANMAN CONTROLLER NETWORK

Backup Control Operation

If a failure occurs on important parts of the Normal control for the Pitch/Azimuth/RPM

control function, the control will automatically be switched over to the backup control

system. A system failure audible and visible alarm will be activated on each of the

control panels.

The thruster control will continue to follow the lever in command, and command

transfer is done by using the common in command buttons. The command can be

transferred between all bridge position and the bridge control levers will continue to

work as in Normal Control.

A failure that occurs on important parts of the Backup control for the Pitch/Azimuth/

RPM control function, will not affect the Normal control system. If a system failure

occurs on the Backup Control an audible and visible alarm will be activated on each of

the control panels

Backup Control Limitations

The backup control system has only interface to the control levers. The backup control

system does not have interface to external control systems like Dynpos, Joystick or

Autopilot.

Local Control

Local control is used if both the normal control and the backup control fail to operate the

thruster azimuth. The thruster azimuth can be operated locally on the actuator unit. The

Control System must first be disconnected from the actuator unit. This can be done by

means of the Local Control switch mounted in front of the Actuator Interface Unit, or

by disconnecting the plug from the actuator unit. If frequency converter used, operate

service switch inside converter cabinet.

The Thruster Instruction Manual will give more details for Local Control operation

Azimuth Indication

The azimuth indication system independent of the normal control system by means of

separate transmitters and electronic circuits. The Azimuth indicators are connected in

series, and are driven from the Backup Control system.

RPM Control

The RPM Control function system controls the speed signal to the frequency converter

for electrical drives or the engine governor for diesel or gas engines.

RPM Control Electric Drive Motor

The RPM Control system includes selection of different operational modes:

• Separate Mode

• Combined Mode

Selection between modes is possible by means of push buttons. RPM Control can be

managed from engine control room only or from additional control panels.

External RPM Control

External RPM order signals from system as DP/Joystick/Auxiliary systems can be

connected to the rpm controller.

The external rpm signal are checked against adjustable preset limits. Any error

conditions on the rpm input signal will initiate a warning to the alarm plant and an error

message will be displayed on the control panel.

RPM Order Output

The output signal from the controller is scaled to meet the actuator signal range from idle

to full rpm, and then fed to external governor, IP converter or frequency converter. The

output will follow a linear curve between idle and full rpm order.

The RPM output rate of change is adjustable and can be adapted to the engine/frequency

converter reversing speed from idle to full rpm (increasing order) and vice versa

(decreasing order).

Propeller/Shaft RPM Indication

The propeller/shaft RPM indicators are connected in series and are driven from the

Backup Control system.

Command Transfer

The term Command transfer is used to describe the procedure performed when the

control is transferred between manoeuvre stations without acceptance on either of the

stations. This is normally the procedure between wheelhouse (bridge) stations.