P0400DA FBM01 Foxboro Industrial Control System Module

Description

P0400DA FBM01 Foxboro Industrial Control System Module

1. Developing towards high speed and large capacity
In order to improve the processing capacity of PLC, it is required that PLC has better response speed and larger storage capacity. At present, the scanning speed of some PLCs can reach around 0.1ms/k steps. The scanning speed of PLC has become an important performance indicator.

In terms of storage capacity, some PLCs can reach up to tens of megabytes. In order to expand storage capacity, some companies have used magnetic bubble storage or hard drives.

2. Developing towards two directions: ultra large and ultra small
Currently, there are many small and medium-sized PLCs. In order to meet the diverse needs of the market, PLCs will develop in multiple varieties, especially in the directions of ultra large and ultra small. There are currently ultra large PLCs with 14336 I/O points, which use 32-bit microprocessors, multi CPU parallel operation, and large capacity memory, with strong functionality.

The development of small PLCs from an overall structure to a small modular structure has made configuration more flexible. In order to meet market needs, various simple and economical ultra small micro PLCs have been developed, with a minimum configuration of 8-16 I/O points to meet the needs of single machine and small automatic control, such as Mitsubishi Corporation α Series PLC.

3. PLC vigorously develops intelligent modules and strengthens networking communication capabilities
In order to meet the requirements of various automation control systems, many functional modules have been continuously developed in recent years, such as high-speed counting module, temperature control module, remote I/O module, communication and human-machine interface module, etc. These intelligent I/O modules with CPU and memory not only extend the functions of PLC, but also are flexible and convenient to use, expanding the application range of PLC.

Strengthening the ability of PLC network communication is the trend of PLC technology progress. There are two types of PLC networking communication: one is between PLCs, and each PLC manufacturer has its own proprietary networking means; Another type is the networking communication between PLCs and computers, and generally PLCs have dedicated communication modules to communicate with computers. In order to strengthen networking communication capabilities, PLC manufacturers are also negotiating to develop universal communication standards to form a larger network system. PLC has become an indispensable and important component of distributed control systems (DCS).

4. Enhance the detection and processing capabilities of external faults
According to statistical data, CPU accounts for 5%, I/O interfaces account for 15%, input devices account for 45%, output devices account for 30%, and circuits account for 5% of the faults in PLC control systems. The first 20% of the faults in the first two items belong to internal faults of the PLC, which can be detected and processed through the software and hardware of the PLC itself; The remaining 80% of faults belong to external faults of the PLC. Therefore, PLC manufacturers are committed to developing specialized intelligent modules for detecting external faults, further improving the reliability of the system.

5. Diversified programming languages
With the continuous development of PLC system structure, the programming language of PLC is becoming increasingly rich and its functions are constantly improving. In addition to the ladder diagram language used by most PLCs, in order to meet various control requirements, there have been stepwise programming languages for sequential control, flowchart languages for process control, and high-level languages compatible with computers (BASIC, C language, etc.). The coexistence, complementarity, and development of multiple programming languages is a trend in the progress of PLC.