In 1969, the United States digital Equipment company developed the first programmable controller (PDP-14), which is recognized as the first PLC in the world.

The microprocessor was introduced in the early 1970s. People soon introduced it into the programmable logic controller, so that the programmable logic controller increased the operation, data transmission and processing functions, to complete the real computer characteristics of the industrial control device. At this time, the programmable logic controller is the product of the combination of microcomputer technology and relay conventional control concept. After the development of personal computers, in order to facilitate and reflect the functional characteristics of Programmable Logic controllers, programmable logic controllers are named Programmable Logic Controller (PLC).

In 1974, China began to develop programmable controller.

In 1977, China promoted PLC in industrial applications.

Central control technology PLC family

Since the first launch of PLC series products in 2005, it has covered G5 series, G3Smart, Fastrol and other products, becoming an important part of the overall solution of industrial automation.

01 G5 Series

G5 series products have the characteristics of high reliability, high volume ratio, high IO accuracy, and industrial wide temperature capability, G3 anti-corrosion, EMC level 3 anti-electromagnetic interference capability, which can meet the working requirements in various harsh environments, built-in information security, to achieve the safest and most reliable control on site.

GCS-G5

GCS-G5 is a fully redundant medium and large networked hybrid control system independently developed by CICC, which has high-speed logic and interlock control capabilities, rich high-order function operations and complete control strategy. The product has a rich network structure, supports a variety of wired and wireless communication modes such as star, bus, ring and Daisy chain, and flexible heterogeneous system access, supports tasks of different cycles and event triggered tasks, and is suitable for corrosion protection, wide ambient temperature (-40ºC-80ºC), high altitude, explosion protection and outdoor use requirements.

G5Pro

G5Pro is a new generation of fully redundant medium and large scale highly reliable programmable logic control system independently developed by ZhongCON. The control system adopts unified UCP communication protocol to realize seamless compatibility of data interaction among GCS series control systems. The control system has been widely used in oil and gas pipeline, rail transit, heating pipe network, sewage treatment, intelligent water supply, traffic tunnel, integrated pipeline corridor, nuclear power, equipment and other industries.

G5Pro Safety

G5Pro Safety is a PLC system independently developed by CCIC to meet the safety integrity level SIL3 certification, which mainly meets the needs of object-oriented control, safety protection and hybrid integrated control, and meets the safety and non-safety integrated control requirements of devices or equipment. The system can be applied to industrial safety control in oil and gas long distance pipeline transmission, ship, automobile manufacturing, rail transit, medical equipment and other fields, including emergency shutdown system (ESD).

02 G3Smart

G3Smart is a new generation of miniaturized and highly reliable programmable logic control system independently developed by CCC. The system meets the requirements of high density and distributed applications. In a narrow installation environment, G3Smart can achieve small points of single-machine control, and can also be used as a remote IO module of G5Pro controller for remote expansion to meet the needs of high system cost, and is widely used in petrochemical, fine chemical, coal chemical, oil and gas exploitation, municipal engineering, metallurgy, pharmaceutical and other industries.

03 Fastrol

Fastrol is an industry-specific controller family, an integrated platform based on highly reliable hardware that enables the rapid construction of multiple types of RTU products. With control operation, data acquisition and communication processing functions, support wireless networking, multi-channel master and slave station heterogeneous access, can adapt to harsh environment. Support fast and flexible customization, focus on single device application requirements, to provide customer device-level overall monitoring control management integration solution. It can be used in pharmaceutical machine supporting, environmental monitoring, cold chain distribution equipment and other scenarios.

Shi Ying, assistant to the president of Zhongcong Technology, said that the future development trend of PLC will definitely have some basic characteristics of DCS and SCADA. Such as high reliability, redundancy, large-scale, networking, etc., and in high-end applications, there are also stronger computing power, more open control technology and data access means, which is also the current demand for intelligent manufacturing. In the future, the PLC of central control technology will continue to deepen the process industry and develop to the field of large equipment, continue to strengthen the reliability, safety and intelligence level, and contribute some strength to the development of national high-end equipment.