Information Technology Integration into PLC Performance Analysis

Infiltration of information technology into PLC is to adapt to the increasingly integrated development trend of factory control system and enterprise information management system; adapt to the control level to allow PLCs of different brands to be effective and fast enough between PLC and DCS, SCADA and other systems. Market requirements for the exchange of data. It is mainly manifested in:

1) Embed a PC with a Windows operating system into the PLC system.

2) Create an open network environment. For example, the Web server module that can hang 100M high-speed Ethernet (QJ71WS96 of Mitsubishi Electric's small Q series and F3WBM1-0T-S01 of Yokogawa's FA-M3 series) is bundled with the most commonly used TCP/IP. , UDP/IP and other transport layer and network layer specifications, as well as HTTP, FTP, SMTP, POP3 and other application layer specifications, so that PLC can directly enter the Internet, become an uncompromising Web-based PLC; can also be made in Japan The PLC is linked to Industrial Ethernet ProfiNet led by the German company Siemens.

At this system control exhibition, we saw the Japanese PLC that was exhibited by Profibus on the booth of Japan's Profibus Organization (JPO), the MICRORE-SX series PLC of Fuji Electric, and the FA- of Yokogawa. M3 series PLCs are directly connected to ProfiNet via their Ethernet modules. Mitsubishi Electric's small Q series PLCs are linked to ProfiNet through their RS232C modules and **** RS232C/Ethernet protocol converters (JNVE1 type).

3) Support for OPC middleware. For example, DeviceXPlorerOPCServer provided by Zhuling Motor can provide software interface for Mitsubishi Electric's MELSEC series PLC, Yokogawa's FA-M3 series PLC, OMRON's SYSMAC series PLC, and Toyota's TOYOPUC series PLC, and as an OPC customer application. The programs communicate with each other.