IMCIS02 BAILEY

PLC new development status and trend

 

There are two main trends in the development of modern PLC: one is the development of small size, fast speed, strong function and low price; The second is the development of large-scale networking, high reliability, good compatibility and multi-function.

 

(1) Large-scale networking is mainly developed in the direction of DCS, so that it has some functions of DCS system. Strong networking and communication capabilities are an important aspect of PLC development, and multiple PLCS and I/O frameworks can be connected down. It is connected with industrial computer, Ethernet, MAP network, etc. to form the automation control system of the whole factory.

 

(2) With the emergence of self-adjustment, stepper motor control, position control, servo control and other modules, the field of PLC control is expanded.

 

For example, as early as the 1980s, the company developed a multi-loop closed-loop control module, stepper motor control module, simulation module and communication processing module. In 1995 and successfully developed the S7200, S7300 series, it has TD 200 and COROS OPS operation template (OPS) to provide users with a convenient man-machine interface, user program three-level password protection, strong computing power, perfect instruction set, MPI interface and network capability via industrial fieldbus PROFIBUS and Ethernet networking, strong internal integration function, comprehensive fault diagnosis function; Modular structure can be used for energy expansion, pulse output thyristor stepper motor and DC motor; Fast instruction processing greatly shortens the cycle time, and high-speed counters are used, and high-speed interrupt processing can respond to process events separately, significantly reducing costs.

 

(3) High reliability Because the reliability of the control system has been paid more and more attention, some companies have widely applied self-diagnosis technology, redundancy technology, fault tolerance technology to existing products, launched a highly reliable redundant system, and the use of hot standby or parallel work, majority voting mode of work. The S7400 PLC’s robust, fully sealed formwork works even in harsh, unstable operating environments and can be hot-swappable during operation.

GENERAL ELECTRIC L90-A00-HCH-F8A​-H6C-LXX-N6B-SX​X-U6H-W7

INDRAMAT DKS01.1-W100A-D​L02-01.FW USPP DKS011W100ADL02​0

ALLEN BRADLEY 1395-A75-C4-P10​-X1 USPP 1395A75C4P10X1

HONEYWELL 51305430-100 USPP 51305430100

SIEMENS 6FM1-470-7AA25 USPP 6FM14707AA25

RELIANCE ELECTRIC 802220-15VC USPP 80222015VC

ALLEN BRADLEY 1336F-B100-ANEN USPP 1336FB100ANEN

RELIANCE ELECTRIC 3RA2015 USPP 3RA2015

INDRAMAT RAC-3.5-100-460​-A01-W1-220 USPP RAC35100460A01

SYMAX 8020-SCP-631 USPP 8020SCP631

SYMAX 8020-SCP-644 USPP 8020SCP644

SQUARE D 8639NSA4SSPL1SP​L2 NSPP 8639NSA4SSPL1SP​L

FANUC A06B-6058-H101 NSFP A06B6058H101

SIEMENS 6ES5-947-3UR21 USPP 6ES59473UR21

HONEYWELL 51401288-100 USPP 51401288100

MODICON AS-D008-040 USPP ASD008040

TB WOODS WF2C4075-0A NSFP WF2C40750A

MOTOMAN ROBOTICS RM6210 USPP RM6210

ALLEN BRADLEY 1336S-B125-AX-E​N3-L6 USPP 1336SB125AXEN3L

ALLEN BRADLEY 512-ESB-6P-27R NSFP 512ESB6P27R

RELIANCE ELECTRIC UVZ3475 USPP UVZ3475

ALLEN BRADLEY 150-A135NBDD USPP 150A135NBDD

EPSON E2L653S-UL USPP E2L653SUL

GENERAL ELECTRIC 6351091AC USPP 6351091AC

SIEMENS 6SE7-031-8TF50-​1AA0 USPP 6SE70318TF501AA​0

CABLETRON ESX-1320-F600 NSFP ESX1320F600