SPBRC410 桥接控制器模块 ABB 基于以太网的现场总线

SPBRC410 桥接控制器模块  ABB 基于以太网的现场总线

Modbus TCP为基于Modbus应用层的现场总线，使用此现场总线可通过标准以太网传输数据(TCP/IP) (不同于使用Modbus RTU和ASCII的串行传输)。和其他大多数基于以太网的现场总线不同的是，例如EtherCAT或Profinet, Modbus TCP不需要现场总线特定的硬件，而采用数百万人使用的普通网卡和路由器运行。除了价格优势外，带Modbus TCP的电机控制器，不仅可以使用PLC,而且还可以轻松地通过标准配置的电脑进行控制，因为几乎每种编程语言都提供了一个库于TCP/IP通讯。

此外,很多情况下，Modbus TCP的专用库已经存在。使用标准硬件也会使Modbus TCP具有缺点，但是:和CAN或EtherCAT不同的是，Modbus 不适合用于需要对多个轴进行准确定时同步的实时应用。通过Ethernet传输速度块,但具有不确定性,即传输时间可能会出现很大的波动,尤其在规模较大的网络中。而Modbus TCP非常适合用于多个电机相互独立控制的应用，例如在进行格式调整时。

同时还可以通过数字输入启动多台电机，并同步使用Modbus TCP盱参数化设置和诊断。您可以在下面找到所有具有Modbus TCP接口的Nanotec产品概述。 

SPBRC410 桥接控制器模块  ABB 基于以太网的现场总线

Modbus TCP is a fieldbus based on the Modbus application layer that allows data to be transmitted over standard Ethernet (TCP/IP) (as opposed to serial transmission using Modbus RTU and ASCII). Unlike most other Ethernet-based fieldbuses, such as EtherCAT or Profinet, Modbus TCP does not require fieldbus-specific hardware and runs on common network cards and routers used by millions of people. In addition to price advantages, motor controllers with Modbus TCP can not only be controlled using PLCS, but also can be easily controlled by standard configuration computers because almost every programming language provides a library for TCP/IP communication.

Also, in many cases, dedicated libraries for Modbus TCP already exist. Using standard hardware also brings disadvantages to Modbus TCP, but: unlike CAN or EtherCAT, Modbus is not suitable for real-time applications that require accurate timing synchronization of multiple axes. Speed blocks are transmitted through Ethernet, but with uncertainty, that is, the transmission time can fluctuate greatly, especially in larger networks. Modbus TCP is ideal for applications where multiple motors are controlled independently of each other, such as when making format adjustments.

Multiple motors can also be started with digital input, and the Settings and diagnostics can be parameterized simultaneously using Modbus TCP. You can find an overview of all Nanotec products with Modbus TCP interfaces below.

SPBRC410 桥接控制器模块  ABB 基于以太网的现场总线