While the DCS was tailored to meet the needs of large continuous industrial processes, in industries where combinatorial and sequential logic was the primary requirement, the PLC evolved out of a need to replace racks of relays and timers used for event-driven control. The old co
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:34:02 ]
The introduction of distributed control allowed flexible interconnection and re-configuration of plant controls such as cascaded loops and interlocks, and interfacing with other production computer systems. It enabled sophisticated alarm handling, introduced automatic event loggi
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:33:23 ]
PLCs can range from small modular devices with tens of inputs and outputs (I/O) in a housing integral with the processor, to large rack-mounted modular devices with a count of thousands of I/O, and which are often networked to other PLC and SCADA systems. They can be designed for
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:32:10 ]
The SCADA software operates on a supervisory level as control actions are performed automatically by RTUs
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:31:30 ]
The SCADA concept was developed as a universal means of remote access to a variety of local control modules, which could be from different manufacturers allowing access through standard automation protocols
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:30:35 ]
hot sales high quality 2L 3L 6L 10L liquid nitrogen containers for artificial insemination Liquid nitrogen tank is a kind of container used to store liquid nitrogen of low temperature. Liquid nitrogen tank have liquid nitrogen storage tank of storage type and liquid nitrogen tran
Xinxiang Zhongpanxin Industry Co., Ltd. [2020-04-15 16:29:56 ]
Supervisory control and data acquisition (SCADA) is a control system
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:29:45 ]
The field inputs and outputs can either be continuously changing analog signals Distributed control systems can normally also support Foundation Fieldbus
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:28:21 ]
The processors receive information from input modules, process the information and decide control actions to be performed by the output modules. The input modules receive information from sensing instruments in the process (or field) and the output modules transmit instructions t
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:27:17 ]
A DCS enables easy configuration of plant controls such as cascaded loops and interlocks, [ further explanation needed ] and easy interfacing with other computer systems such as production control A DCS typically uses custom-designed processors as controllers, and uses either pro
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:26:38 ]
A distributed control system (DCS) is a digital processor control system for a process or plant, wherein controller functions and field connection modules are distributed throughout the system. As the number of control loops grows, DCS becomes more cost effective than discrete co
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:25:53 ]
Quite complex systems can be created with networks of these controllers communicating using industry standard protocols. Networking allow the use of local or remote SCADA operator interfaces, and enables the cascading and interlocking of controllers. However, as the number of con
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:25:06 ]
Liquid nitrogen container ,50L Cryogenic Container Freezer Liquid Nitrogen Storage Tank Detail picture YDS Series Liquid Nitrogen tank Application 1. Active preservation of animal semen. At present, it is mainly used for the preservation of semen from excellent breeds such as cat
Xinxiang Zhongpanxin Industry Co., Ltd. [2020-04-15 16:24:38 ]
The simplest control systems are based around small discrete controllers with a single control loop
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:24:24 ]
Larger systems are usually implemented by supervisory control and data acquisition
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:23:43 ]
Industrial control system ( ICS ) is a general term that encompasses several types of control systems Such systems can range in size from a few modular panel-mounted controllers to large interconnected and interactive distributed control systems with many thousands of field conne
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:22:43 ]
A variant of PLCs, used in remote locations is the remote terminal unit
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:21:46 ]
In more recent years, [ when? ] small products called programmable logic relays (PLRs) or smart relays, have become more common and accepted. These are similar to PLCs and are used in light industry where only a few points of I/O are needed, and low cost is desired. These small d
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:20:55 ]
PLCs may include logic for single-variable feedback analog control loop, a PID controller
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:20:08 ]
Very complex process control, such as used in the chemical industry, may require algorithms and performance beyond the capability of even high-performance PLCs. Very high-speed or precision controls may also require customized solutions; for example, aircraft flight controls. Sin
FUJIAN Xiamen ZheXun Electric Automation Co., Ltd. [2020-04-15 16:19:29 ]
