MVME172-303A MVME172-313 MVME172-313A MVME172-323 MVME172-323A MVME172-333模块卡件MVME172-333A MVME172-343 MVME172-343A MVME177PA-66SE MVME259E MVME2306 MVME2604-1151A MVME2604-1351 SYS336M16
PROFIBUS-PA满足本质安全和非本质安全要求区域，包括总线供电的现场设备。注：PROFIBUS徽标是PROFIBUS International的注册商标组织该组织的成员资格对所有个人开放，总线通信PROFIBUS规范定义了串行现场总线的技术特性将网络上的分布式数字控制器从场级连接到单元级的系统。
PROFIBUS是一个多主系统，允许多个自动化系统的联合操作，工程或可视化系统，其分布式外围设备位于一条总线上。PROFIBUS区分了以下类型的设备：主设备决定总线上的数据通信。主机可以发送持有总线访问权限（令牌）时没有外部请求的消息。主站也称为活动站。•从设备包括运动控制器、驱动器、输入/输出设备、阀门和传感器。从机没有总线访问权限，只能确认收到消息或在请求时向主机发送消息。奴隶设备是无源站，只需要总线协议的一小部分。大多数PROFIBUS-DP应用程序位于现场级别。现场级别通常包括从设备，例如S2K运动控制器站和主机PROFIBUS-DP主站的PLC或PC控制系统等设备。操作人员接口和DCS型系统通常在单元级运行。PROFIBUS-PA Meets requirements for intrinsic safety and non-intrinsic safety
areas and includes bus powered field devices.
Note: The PROFIBUS logo is a registered trademark of the PROFIBUS International
Organization. Membership in the organization is open to all individuals,
companies and organizations. More information about the organization and the
protocol is available at http://www.profibus.com
Bus Communication
The PROFIBUS specification defines the technical characteristics of a serial field bus
system that links distributed digital controllers on the network, from field level to cell level.
PROFIBUS is a multi-master system that allows the joint operation of several automation,
engineering or visualization systems with their distributed peripherals on one bus.
PROFIBUS distinguishes between the following types of devices:
•
Master devices determine the data communication on the bus. A master can send
messages without an external request when it holds the bus access rights (the token).
Masters are also called active stations.
•
Slave devices include motion controllers, drives, I/O devices, valves, and
transducers. Slaves do not have bus access rights and can only acknowledge
received messages or send messages to the master when requested to do so. Slave
devices are passive stations and require only small portions of the bus protocol.
The majority of PROFIBUS-DP applications are located at the field level. The field level
typically includes slave devices such as the S2K motion controller station and host
devices like PLC or PC control systems for the PROFIBUS-DP master station. Operator
interfaces and DCS type systems usually operate at the cell level.
