电动执行机构的MODBUS RTU接口使用说明书

SIPOS 5 Flash
电动执行机构的 使用说明书
Modbus RTU 接口
2007年2月版 版权所有！ 订购号：E20185-P920-B706-X-5D00
© SIPOS Aktorik GmbH 2007内容 页码
1 安全须知······················································································································3
1.1 和安全有关的术语·····················································································································3
2 SIPOS 5 Flash电动执行机构的Modbus总线接口······················································3
2.1 概述··········································································································································3
2.2 Modbus总线接口······················································································································4
2.3 Modbus RTU – 基本功能··········································································································4
2.3.1 报文结构·······················································································································································4
2.3.2 Modbus串行通讯的消息帧···························································································································5
2.3.3 三种PDU类型 – 通讯过程·····························································································································5
2.3.4 数据模型·······················································································································································6
2.3.5 功能码 – 支持的服务····································································································································6
3 技术数据及功能···········································································································7
3.1 带Modbus RTU总线接口的SIPOS 5 Flash电动执行机构··························································7
3.2 带Modbus 总线接口的SIPOS 5 Flash电动执行机构 – 基本功能···············································8
3.3 带Modbus总线接口的SIPOS 5 Flash电动执行机构 – 附加的功能··········································10
3.4 电气连接（铜缆或光纤）········································································································11
4 设置Modbus RTU的通讯参数···················································································13
4.1 Modbus RTU的通讯参数········································································································13
4.2 可选项∕设定工具···················································································································13
5 使用带Modbus 总线接口的SIPOS 5 Flash电动执行机构········································14
5.1 通过Modbus总线进行控制······································································································14
5.2 禁止就地控制单元···················································································································14
5.3 显示的故障信息（专业型PROFITRON）···············································································14
6 广播方式及安全功能··································································································15
6.1 广播信息·································································································································15
6.2 Modbus的安全功能·················································································································15
7 Modbus RTU的冗余型·····························································································15
8 连接状态和故障信号··································································································16
8.1 连接状态·································································································································16
8.2 总线通讯故障∕和校验故障····································································································16
9 参考文献····················································································································34
附录
A 输入寄存器······················································································································17-22
B 保持寄存器······················································································································23-30
C 离散量输入····························································································································31
D 线圈·······································································································································32
E 电报：“读取异常状态”，“报告从站标识”及“读取设备标识” ·····································33
第2页 E20185-P920-B706-X-5D001 安全须知
警告标识，表明如果操作不正确，会影响人身或设备的安全。
1.1 和安全有关的术语
本手册描述了SIPOS 5 Flash电动执行机构的Modbus总线接口。你还可以在中文使用说明书E20185-P920-B701-X-5D00（ 专
业型PROFITRON）及E20185-P920-B700-X-5D00（经济型ECOTRON）中找到更多的关于SIPOS 5 Flash电动执行机构详细信
息，包括电气和机械连接，参数设置和调试等。
出厂前，所有具有Modbus总线通讯能力的执行机构都预先安装了Modbus总线接口，并进行了测试。
本手册必须同执行机构相应的使用说明书结合在一起来使用。
当进行同执行机构有关的工作时，必须遵守包含在使用说明书中的安全准则。本手册只包含有Modbus总线接口的有关内容！
建议由SIPOS AKTORIK服务中心的服务和支持人员进行所有的计划、安装、调试和服务的工作。
2 SIPOS 5 Flash电动执行机构的 Modbus总线接口
2.1 概述
• 关于Modbus RTU的一般知识
为了在自动化系统之间、自动化系统和所连接的分散的现场设备之间进行信息交换，如今串行现场总线被主要用作通讯系
统。成千上万的应用已经强烈地证明了通过使用现场总线技术，可以节省多至40％的接线、调试及维护的费用。
仅仅使用两根电线就可以传送现场设备的所有相关信息，比如输入和输出数据、参数、诊断数据。过去使用的现场总线往
往是制造商的特定现场总线，并且同其它现场总线不兼容。如今使用的现场总线几乎是完全公开和标准化的。这就意味者用户
可以以最合理的价格选择最好的产品，而不用依赖于每个独立的制造商。
Modbus RTU是一种国际的、开放的现场总线标准。作为一种很容易实现的现场总线协议，在全世界范围内，Modbus得到
了成功的应用。应用领域包括生产过程中的自动化、过程控制和楼宇自控。
• 基本特征
Modbus RTU决定了一个由它把分散的数字自动化设备连接在一起的、串行现场总线系统的技术和功能特点。它被设计成
在现场级以极高的速度传递数据。这里的中央控制设备，比如PLC或PC机，通过有关高速的串行接口同外围的现场站进行开关
量及∕或模拟量的输入输出数据通讯。
基本的是非循环通讯服务。
Modbus区别主站设备和从站设备。
主站设备 控制总线上的数据交换。主站被允许毋需一个外部请求就可以发送信息。
从站设备 诸如SIPOS 5 Flash电动执行机构等的外围设备。典型的从站设备是输入输出设备，阀门，执行机构和测量变送
器。它们不具备访问总线的能力，也就是说，它们仅仅可以确认已经接受到的信息，或者，在主站的要求下发送信息到主站。
从站通常也被称作被动站。
一般适用下列规则：
o 在一条总线上，只允许有1个主站可以在工作状态（单主站总线系统）。
o 最多可以有247个从站被连接到一条总线上。
o 总是由主站启动通讯，从站只能是响应主站的请求。
o 保护特点：“和校验”及奇偶校验位。
E20185-P920-B706-X-5D00 第3页主站同现场设备（从站）的通讯有两种方式：
o 单独通讯方式 – 直接向一个特定的现场
设备发出请求。
（从站地址不能为“0”）：
“正常”操作： 主站
主站向某个现场设备发出请求，该设备随 请求 响应
后作出响应。
从站
从站
从站
o 广播方式 – 针对所有现场设备的总的请
求。
（从站地址为“0”）：
主站发送一个请求（报文）给所有的总线 主站
站。例如，发送一个“紧急”命令，而不 请求
需要任何从站的响应。
更进一步的说明，请参考第6.1节。
从站
从站
从站
2.2 Modbus总线接口
• 1通道或2通道（冗余型）。
• 适用于所有的多回转、直行程或角行程电动执行机构，以及两种控制单元，经济型（ECOTRON）和专业型（PROFITRON）。