DSC - General
Page 7 of 80
1 DSC
1.1 GENERAL
WARNING:
IN ORDER TO MAINTAIN SAFE VESSEL OPERATION JASTRAM
STRONGLY RECOMMENDS THAT ALL STEERING SYSTEMS HAVE
SOME MEANS OF AUXILIARY STEERING. REVIEW ALL TECHNICAL
DESCRIPTIONS AND DOCUMENTAION AND CONFIRM THAT
ADEQUEATE AUXILIARY STEERING IS FITTED.
WARNING:
IN ORDER TO MAINTAIN SAFE VESSEL OPERATION CREW MUST
REVIEW ALL TECHNICAL DESCRIPTIONS AND DOCUMENTATION
AND KNOW PROCEDURES REQUIRED TO QUICKLY TRANSFER TO
THE AUXILIARY MEANS OF STEERING.
Description
The Digital Steering Controller (DSC) is the main control component of the
digital steering control system. The DSC communicates with up to five
Mode Control Processor(s) (MCP) at various locations on the vessel.
Each MCP is connected to the DSC through a single communication cable
thereby reducing the cabling and termination requirements to each of the
steering control stations.
The DSC also connects to the Rudder Feedback Unit (RFU) and the
directional solenoid valve of the Hydraulic Power Unit (HPU) in order to
provide the closed loop positional control of the steering gear. Connection
interfacing to a variety of autopilot systems is provided through the DSC
as is the optional connections to a backup Non Follow Up controller.
The software program running in the DSC manages all of the MCP’s in
order to ensure that only one steering input device is able to control the
position of the rudder at any given time. The same DSC can be used to
control either on-off or proportional type directional solenoid valves. On-
off valves control the flow of hydraulic fluid in fixed manner while
proportional valves vary the flow of hydraulic fluid allowing the rudder to
accelerate and decelerate during rudder movements.
The DSC is configured and commissioned through the use of a portable
PC and a proprietary software program. The DSC can also be configured
and commissioned using the keypad and LCD screen on the DSC. When
the DSC is operating in its run mode the LCD screen is used to provide
Doc No.: MAN01504, 20-02-06 DSC 100 & MCP 100 Manual
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