Woodward 5466-340模块备件

Woodward 5466-340

速度控制器接收来自一个或两个电磁阀的涡轮速度信号
拾取器或接近探头。速度PID（比例、积分、微分）
然后，控制放大器将该信号与速度设定点进行比较，以生成一个
执行器的输出信号（通过低信号选择总线）。
速度控制的设定点可通过以下方式使用升高或降低命令进行调整：
控制装置前部的键盘、远程触点输入或
通信线路。也可以通过输入新值直接设置设定点
从键盘或通过Modbus通信获取设定值。此外
可以对模拟输入进行编程，以远程定位速度设定点。
远程速度设定点
4–20 mA输入之一可配置为控制速度设定点。
通常，505外部的过程控制与此输入接口，以
调节涡轮机的速度或负载以控制相关过程。
远程速度设定点输入直接影响505的速度设定点。这个
远程输入信号改变速度设定点的大速率为：
可编程。当远程设定点启用时，速度设定点将
以慢得多的速度移动，直到两个设置匹配，此时
速度设定点将允许以大速率移动。远程速度
可以根据需要从前面板键盘启用和禁用功能，
远程接触输入或通信线路。
辅助控制
辅助控制信道可用于控制参数或限制参数
参数辅助PID控制器可用于控制或限制机组
负荷/功率、设备进口/出口水平、进口压力、排气压力、，
温度或与涡轮机负载直接相关的任何其他过程。
辅助输入为4–20 mA电流信号。辅助PID控制
放大器将此输入信号与设定点进行比较，以产生控制输出，以：
数字LSS（低信号选择）总线。LSS总线将低信号发送至：
致动器驱动器电路。
辅助设定点可通过升高或降低命令进行调整
通过远程触点输入或通过
通信链路。此外，可通过输入新参数直接设置设定点
来自键盘或通过Modbus通信的设定点。此外
模拟输入可编程为远程定位辅助设定点。
远程辅助设定点
4–20 mA输入中的一个可以配置为远程调整aux设定点。
远程辅助设定点输入直接影响辅助设定点。这个
远程输入信号改变辅助设定点的大速率
是可编程的。启用远程设定点时，辅助设定点将：
以慢得多的速度移动，直到两个设置匹配，此时
允许设定点以大速率移动。远程辅助功能
可根据需要从前面板键盘、遥控器启用和禁用
接触输入或通信链路。

Woodward 5466-340

Woodward 5466-340

The speed control receives a turbine speed signal from one or two magnetic pickups or proximity probes. The speed PID (proportional, integral, derivative) control amplifier then compares this signal to the speed setpoint to generate an output signal to the actuator (through a low signal select bus). The speed control’s setpoint is adjustable with raise or lower commands through the keypad on the front of the control, remote contact inputs or the communication line. The setpoint can also be directly set by entering the new setpoint from the keypad or through either Modbus communications. In addition, an analog input can be programmed to remotely position the speed setpoint. Remote Speed Setpoint One of the 4–20 mA inputs can be configured to control the speed setpoint. Typically, a process control external to the 505 interfaces with this input to regulate the turbine’s speed or load to control a related process. The remote speed setpoint input directly affects the 505’s speed setpoint. The maximum rate at which the remote input signal can change the speed setpoint is programmable. When the remote setpoint is enabled, the speed setpoint will move at a much slower rate until the two settings are matched at which time the speed setpoint will be allowed to move at the maximum rate. The remote speed function can be enabled and disabled as required from the front-panel keypad, remote contact inputs or the communication line. Auxiliary Control The Auxiliary control channel can be used to either control a parameter or limit a parameter. The Auxiliary PID controller can be used to control or limit unit load/power, plant import/export levels, inlet pressure, exhaust pressure, temperature or any other process directly related to turbine load. The Auxiliary input is a 4–20 mA current signal. The Auxiliary PID control amplifier compares this input signal with a setpoint to produce a control output to the digital LSS (low-signal select) bus. The LSS bus sends the lowest signal to the actuator driver circuitry. The Auxiliary setpoint is adjustable with raise or lower commands through the keypad on the front of the control, through remote contact inputs or through the communication links. Also, the setpoint can be directly set by entering the new setpoint from the keypad or through either Modbus communications. In addition, an analog input can be programmed to remotely position the Auxiliary setpoint. Remote Aux Setpoint One of the 4–20 mA inputs can be configured to remotely adjust the aux setpoint. The remote aux setpoint input directly affects the Auxiliary setpoint. The maximum rate at which the remote input signal can change the auxiliary setpoint is programmable. When the remote setpoint is enabled, the Auxiliary setpoint will move at a much slower rate until the two settings are matched at which time the setpoint will be allowed to move at the maximum rate. The remote aux function can be enabled and disabled as required from the front panel keypad, the remote contact inputs, or the communication links.