Woodward 2301D, Инструкция по установке и эксплуатации, Страница: 46 / 130

2301D/2301D-EC Digital Control Manual 26247
38 Woodward
G**SPEED SETTINGS**
Speed settings are the parameters that affect the prime mover speed reference.
01 START SPEED (RPM) dflt = 400.00 (1.00, 2100)
The initial speed reference for the speed control before starting. Start speed must
be set above cranking speed and below the speed achieved with the start fuel
limit setting (light-off speed). A ramp from start speed to idle or rated, whichever
is selected, begins when the engine accelerates to start speed. The ramp time is
the accel ramp time setting, when going to the rated speed set point. The ramp
time is the decel ramp time setting, when going to the idle speed set point.
02 RAISE SPEED LIMIT (RPM) dflt = 1000.00 (0.00, 4000.00)
The maximum speed reference setting when the raise switch is closed. It is
normally set at the speed at which the engine operates at full load if the Droop
mode is used, or at the high limit of the speed trim function.
03 LOWER SPEED LIMIT (RPM) dflt = 800.00 (0.00, 4000.00)
The minimum speed reference setting when the lower switch is closed. It is
normally set at the minimum operating speed of the engine, or at the minimum
limit of the speed trim function.
04 IDLE SPEED (RPM) dflt = 600.00 (0.00, 4000.00)
This is the speed that the speed reference ramp goes to when the close for rated
discrete input is OPEN. It is normally the speed at which the engine is operated
at start-up. It is also used during cool down.
Idle Speed is limited to a value between synchronous speed entered
in configure and 20% of synchronous speed (a 5 to 1 speed range).
Avoid critical speeds when setting idle speed.
Never set the idle speed and the rated speed at the same value.
05 ACCEL RAMP TIME (SEC) dflt = 20.00 (1.00, 300.00)
The time required for the control to ramp the engine speed from idle speed to
rated speed. The ramp is started whenever the Idle/Rated contact is closed.
06 DECEL RAMP TIME (SEC) dflt = 20.00 (1.00, 300.00)
The time required for the control to ramp the engine speed from rated speed to
idle speed. The ramp is started whenever the Idle/Rated contact is opened.
Actual engine deceleration may be slower than set by the Decel
Ramp Time set point. This occurs when the Decel Ramp Time set
point is faster than the amount of time that system inertias allow the
engine to slow down. This condition is indicated by the control
actuator output going to the minimum fuel position.
07 SPEED TRIM INC TIME (SEC) dflt = 30.00 (1.00, 300.00)
This is the time for the speed reference to ramp from the lower speed limit to the
raise speed limit when using the Raise Speed switch input.