Woodward 5464-024模块备件

Woodward 5464-024

控制通信
两个Modbus端口，用作控制接口。协议可以是
ASCII或RTU，通信可以是RS-232、RS-422或RS-485。
一个计算机（PC）端口，用于程序配置存储。
505E功能的概述如图1-1所示。使用此框图
以将控制功能与所需的现场特定应用程序相匹配。
图1-1a。505E功能概述（注释）
505E数字调速器手册85018V1
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图1-1b。505E功能概述
手动85018V1 505E数字调速器
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图1-1c。505E功能概述
505E数字调速器手册85018V1
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控制概述
505E数字调速器设计用于控制提取、提取和过滤/
或进入蒸汽涡轮机。这些涡轮机之间的差异
是涡轮机允许低压蒸汽的能力
以进入和/或退出涡轮机。抽汽涡轮机
允许低压（抽汽）蒸汽仅从汽轮机中排出，并具有：
抽汽集管/管线中的止回阀，防止蒸汽进入
涡轮机。进气涡轮机（也称为进气）将允许过量的集管
蒸汽通过低压入口进入汽轮机。一
抽汽/进气涡轮机将允许低压集管蒸汽进入或排出
涡轮机的运行取决于系统压力。具有进气能力的涡轮机
将在低压管路中配备截止阀或跳闸和节流阀，以防止
当机组跳闸时，防止蒸汽进入汽轮机。所用涡轮机的类型
将取决于系统要求，必须由涡轮机设计
制造商执行所需的功能。
505E有两个独立的控制通道，即spe

Woodward 5464-024

Woodward 5464-024

Control Communications Two Modbus ports, to be used as control interfaces. The protocol can be either ASCII or RTU and the communications can be RS-232, RS-422, or RS-485. One computer (PC) port to be used for program configuration storage. An overview of the 505E functions is shown in Figure 1-1. Use this block diagram to match the control features to the site-specific application required. Figure 1-1a. Overview of 505E Functionality (Notes) 505E Digital Governor Manual 85018V1 6 Woodward Figure 1-1b. Overview of 505E Functionality Manual 85018V1 505E Digital Governor Woodward 7 Figure 1-1c. Overview of 505E Functionality 505E Digital Governor Manual 85018V1 8 Woodward Control Overview The 505E Digital Governor is designed to control extraction, extraction/ admission, or admission steam turbines. The difference between these turbines is the capability of the turbine to allow low pressure steam, which is at a lower pressure than the inlet, to enter and/or exit the turbine. An extraction turbine allows the lower pressure (extraction) steam to exit the turbine only and will have a non-return valve in the extraction header/line to prevent steam from entering the turbine. An admission turbine (also called induction) will allow excess header steam to enter the turbine through the low pressure inlet. An extraction/admission turbine will allow low pressure header steam to enter or exit the turbine depending on system pressures. A turbine with admission capability will have a stop valve or trip-and-throttle valve in the low pressure line to prevent steam from entering the turbine when the unit is tripped. The type of turbine used will depend on the system requirements and must be designed by the turbine manufacturer to perform the functions required. The 505E has two independent control channels available, the spe