NW-BM85C002 控制器将生成反馈信息并用Modbus协议发出

Description

NW-BM85C002 控制器将生成反馈信息并用Modbus协议发出

Modbus是一种串行通信协议，广泛应用于工业自动化领域。它最初由Modicon公司（现在的施耐德电气 Schneider Electric）于1979年为使用可编程逻辑控制器（PLC）通信而发表。Modbus已经成为工业领域通信协议的业界标准，并且现在是工业电子设备之间常用的连接方式。

Modbus协议定义了一个控制器能认识使用的消息结构，而不管它们是经过何种网络进行通信的。NW-BM85C002描述了一控制器请求访问其它设备的过程，如果回应来自其它设备的请求，以及怎样侦测错误并记录。它制定了消息域格局和内容的公共格式。当在一个Modbus网络上通信时，此协议决定了每个控制器须要知道它们的设备地址，识别按地址发来的消息，决定要产生何种行动。如果需要回应，控制器将生成反馈信息并用Modbus协议发出。

Modbus协议目前存在用于串口、以太网以及其他支持互联网协议的网络的版本。基于串口通信，存在两个变种，即RTU和ASCII两种通信模式。此外，Modbus协议采用主从架构，其中只有一个主设备，可以有1-247个从设备。主设备通过特定的地址与从设备进行通信。

总之，Modbus是一种广泛应用于工业自动化领域的串行通信协议。NW-BM85C002具有开放性、通用性和灵活性等特点，能够实现不同厂商生产的控制设备之间的互连互通，提高工业自动化系统的可靠性和稳定性。

NW-BM85C002 控制器将生成反馈信息并用Modbus协议发出

Modbus is a serial communication protocol, widely used in the field of industrial automation. It was originally published by Modicon Corporation (now Schneider Electric) in 1979 for communication using programmable logic controllers (PLCS). Modbus has become the industry standard for communication protocols in the industrial sector and is now a common way of connecting industrial electronic devices.

The Modbus protocol defines a message structure that a controller understands to be used, regardless of the network over which they communicate. NW-BM85C002 describes how a controller requests access to other devices, if it responds to requests from other devices, and how errors are detected and logged. It establishes a common format for message domain schema and content. When communicating over a Modbus network, this protocol determines that each controller needs to know their device address, recognize messages sent by address, and decide what action to take. If a response is required, the controller generates a feedback message and sends it out using Modbus protocol.

The Modbus protocol currently exists in versions for serial ports, Ethernet, and other networks that support Internet protocols. Based on serial communication, there are two variants, namely RTU and ASCII two communication modes. In addition, the Modbus protocol uses a master-slave architecture, where there is only one master device and there can be 1-247 slave devices. The master device communicates with the slave device at a specific address.

In short, Modbus is a serial communication protocol widely used in the field of industrial automation. NW-BM85C002 has the features of openness, versatility, and flexibility. It can realize the interconnection between control devices produced by different manufacturers, and improve the reliability and stability of industrial automation systems.