P-OPEN-P4-150PAC-OP150P4运动控制模块
对于致动器电流为20至160 mA的控制器，最小燃料定义为：
•正向作用控制的致动器电流小于10 mA。
•执行器电流大于180 mA，用于反向动作控制。
对于致动器电流为40至320 mA的控制器，最小燃料定义为：
•正向作用控制的致动器电流小于20 mA。
•反向作用控制的致动器电流大于360 mA。
可串联连接超越故障转速信号电路的触点端子18和端子16（或高压控制上的端子0）。
暂时闭合触点会覆盖故障的速度信号电路，该电路可能需要启动。
由于安装的多样性以及系统和部件公差，控制必须调整到每个系统以获得最佳性能。这个用于设置和调整这些电路的电位计位于上部控件的右角，如图4-2所示。它们包括：
•额定转速电位计
•起动燃油限制电位计
•复位、增益和致动器补偿
•斜坡时间和低怠速电位计调整额定转速电位计，以便在额定转速下转换器速度电压和参考速度电压相等。
起动燃油限制电位计提供限制燃油架的方法起动柴油发动机时的位置。电位计的调整设置所需的最大致动器位置。此限制位置将自动启用并在速度控制接管时关闭。
复位、增益和执行器补偿电位计调整控制放大器，以适应各种类型的原动机系统。这个复位调整会影响原动机在故障后恢复时的反应时间负载突然变化。由于通过调整增益来控制负载的突然变化。致动器补偿补偿执行器和原动机的时间系统需要对来自控制器的信号作出反应。
原动机从怠速加速到额定转速所需的时间，以及建议的怠速与缓变时间和低怠速一起设置分别为速度电位计。
For controls with actuator current of 20 to 160 mA, minimum fuel is defined as:
• Actuator current less than 10 mA for forward-acting controls.
• Actuator current greater than 180 mA reverse-acting controls.
For controls with actuator current of 40 to 320 mA, minimum fuel is defined as:
• Actuator current less than 20 mA for forward-acting controls.
• Actuator current greater than 360 mA for reverse-acting controls.
A contact to override the failed-speed-signal circuit can be connected in series
with terminal 18 and terminal 16 (or terminal 0 on high voltage controls).
Temporarily closing the contact overrides the failed-speed-signal circuit, which
may be required for start-up.
Because of the variety of installations, plus system and component tolerances,
the control must be tuned to each system for optimum performance. The
potentiometers for setting and adjusting these circuits are located in the upper
right corner of the control as shown in Figure 4-2. They include:
• the RATED SPEED potentiometer
• the START FUEL LIMIT potentiometer
• RESET, GAIN, and ACTUATOR COMPENSATION
• RAMP TIME and LOW IDLE SPEED potentiometers
The RATED SPEED potentiometer is adjusted so that at rated speed, the
converter-speed voltage and the reference-speed voltage are equal.
The START FUEL LIMIT potentiometer provides a means of limiting the fuel-rack
position when starting diesel engines. Adjustment of the potentiometer sets the
maximum actuator position desired. This limit position is automatically enabled
prior to start-up, and is turned off when speed control takes over.
RESET, GAIN and ACTUATOR COMPENSATION potentiometers adjust the
control amplifier to accommodate various types of prime-mover systems. The
RESET adjustment affects prime mover reaction time when recovering after a
sudden load change. The magnitude of the speed change resulting from a
sudden change in load is controlled by adjusting the GAIN. ACTUATOR
COMPENSATION compensates for the time the actuator and prime mover
system takes to react to signals from the control.
The time taken by the prime mover to accelerate from idle to rated speed, and
the recommended idle speed, are set with the RAMP TIME and LOW IDLE
SPEED potentiometers respectively.
