A-B 罗克韦尔 140A-C-ASA11A 侧装辅助触点

A-B 罗克韦尔 140A-C-ASA11A 侧装辅助触点

PLC在开放性方面也有了实质性的突破。多年PLC被攻击的一个重要方面就是它的专有性，现在有了较大的改观。

PLC采用了各种工业标准，如IEC 61131，IEEE802.3以太网，TCPIP，UDPIP等，各种事实上的工业标准，如Windows NT，OPC等。

PLC在硬件上也有长足进步。微电子技术的进展全都运用到PLC中，元器件的集成度越来越高，促使PLC成本下降和可靠性提高。专为PLC的设计的

PLC-on-a-chip芯片业已问世多年。

PLC的产品在体系结构和操作系统上都有了质的变化.性能大幅提高。一个机架上可装多个模块。也出现了以Web为基础的PLC系列产品。

PLC has also made substantial breakthroughs in terms of openness. An important aspect of PLC that has been attacked for many years is its exclusivity, and now there is a great change.

PLC adopts various industrial standards, such as IEC 61131, IEEE802.3 Ethernet, TCPIP, UDPIP, etc., and various industrial standards in fact, such as Windows NT, OPC, etc.

PLC has also made great progress in hardware. The progress of microelectronics technology is all applied to PLC, and the integration of components is getting higher and higher, which promotes the cost reduction and reliability improvement of PLC. Designed for PLC

PLC-on-a-chip chips have been available for many years.

PLC products have undergone qualitative changes in the architecture and operating system. Performance is greatly improved. Multiple modules can be mounted on a single rack. There are also a series of PLC products based on Web.