Operating manual ALPHASEAPILOT MFC Issue 1.1 Page 73 of 84
ALPHASEAPILOT MFC
The Control Unit REMOTE Key.
It must be noted that only the designated Master Control Unit is capable of independent
operation since it does not require “permission” from any other Autopilot system component to
become active.
The Master station is also the only station that can
grant “permission” to any other Control Unit(s) – (2
nd
stations) – which are only enabled when the Master
station “REMOTE” key is activated (red corner LED
of keypad illuminated).
The Master Control Unit will immediately disable any other Control Unit(s) if the Master station
REMOTE key is deactivated (red corner keypad LED off).
In this way, the Master station has unconditional control of the Autopilot system.
2.41 NT920 NFU Power Steering – Refer to Section 1.21
2.42 NT990 FU Power Steering – Refer to Section 1.22
2.43 Special Latched and Non Latched Power Steer Controls
In addition to the Follow Up (NT990 FU) and Non Follow Up (NT920 NFU) Power Steer options,
the Autopilot will accept proprietary unit power steer inputs via a dedicated opto isolated input
port for special uses.
Power Steer inputs to this port can provide one of three installation selectable working modes
programmed via the Autopilot SET UP Menu.
2.43 (i) Normal proprietary Follow Up Power Steer:-
Typically, a proprietary unit of this type will be fitted with a lever operated linear potentiometer
and the angle of rudder applied will be directly related to the angle through which the lever is
moved – often against a graduated scale.
When the Follow Up lever is central, the rudder will be at mid ships and, if the lever is moved
and left at mid scale, the rudder will be positioned and will remain at the mid scale value
accordingly.
This is conventional Follow Up Power Steer operation and can be selected via the Autopilot SET
UP Menu (Parameter No.62 set to NORM).
Application notes in Section TM3 of the Installation and Technical Manual.
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