determined by the position of the PACC
propulsion engines and propeller pitch commands
programmed control lever.
through the DMS and the SCU. These commands
The analog signals are then converted to digital
data for transmission over the DMS network. The
processor in the SCU outputs the digital
commands to digital-to-analog converters in the
input/output multiplexer. (The multiplexer is in
the SCU.) The analog signals are then used to
control the gas turbine propulsion engine speed,
then the shaft rpm, and finally the propeller
pitch.
This section has two control levers used
to control speed of the GTEs and propeller
pitch for each shaft. The left lever controls
t h e port shaft, G T E 2B, and GTE 2A.
The right lever controls the starboard shaft,
Control Location Section
GTE 1B, and GTE 1A. The movement of
either lever results in engine speed and propeller
There is a control location section for each
pitch demand outputs to control ship speed.
shaft (port and starboard). The sections are
Linear scales alongside each lever are marked
mirror image so we will describe only the port
with a 10, corresponding with maximum
control location section. These sections are located
speed ahead, a 3.3 with maximum speed
to the lower left and lower right side, respectively,
astern, and 0 to zero thrust. The levers may be
of the programmed control levers.
mechanically locked together for simultaneous
Each control location section has three
control of both levers.
LEDs and three push buttons. The first LED is
labeled THRUST CONTROL LOCAL LOCK-
OUT. It illuminates red when either SCU MODE
SELECTOR (on the SCU) is in the LOCKOUT
manual position. It indicates control is at the
SCU. The other two LEDs are located under the
heading PRPLN/AUX. The first LED, labeled
CTL CONT STA, illuminates green to indicate
control of the port propulsion unit and propul-
sion auxiliaries is at the PACC. The second LED,
labeled LOCAL, illuminates green to indicate
control of the port propulsion unit and propul-
sion auxiliaries is at SCU-2.
PLASMA DISPLAY
KEYBOARD PANEL (A3)
Programmed Control Lever Section
This panel is identical to the keyboard
control panel on the EOOW/LU described
The programmed control levers on the PACC
previously. The keyboard is common to all the
provide power commands to the gas turbine
propulsion consoles in the MCS.
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