I. Introduction to DCS System Concept
DCS is an abbreviation for Distributed Control System, which is commonly referred to as a distributed control system. It was first developed by Honeywell in 1975 as an automation control system for production processes. Below, we will use a DCS system structure diagram to introduce its functional components.
The diagram divides the DCS system into four levels: field level, control level, monitoring level, and management level.
Field-level: It is not a component of DCS, but it is the link between DCS and field devices. That is to say, various information from the field is sent to the DCS system through them; information from the DCS system is sent to the field devices through them.
Control level: also known as process level, mainly consists of process control stations and I/O units. It is the main part of the DCS control system, where various information can be controlled and managed.
Monitoring level: also known as the operation level, mainly consists of operator stations and engineer stations, providing users with an interface to complete system monitoring and configuration operations.
Management level: This mainly involves data management and the development and application of more advanced functions. With the development of technology, the functions of this advanced level of DCS are becoming more and more powerful and more flexible and convenient to use.
II. Introduction to the PKS System
PKS is an abbreviation for Process Knowledge System (some people habitually translate it as "Process Knowledge System," but I personally think it's unnecessary; the name itself is sufficient). It's the latest generation of process automation system from Honeywell Systems, Inc. Let's take a look at the PKS system architecture diagram:
I've roughly divided the diagram into four sections for easier analysis. Let's call them 1, 2, 3, and 4 from bottom to top.
1. The field instrumentation section is the same as that of the DCS and will not be described further.
2. Control Section: Here we can see Honeywell's latest control station hardware, the C system hardware, as well as Honeywell's earlier control products, the C200 and TPS, and even the world's first TDC3000. The SafetyManager on the right belongs to the SIS system, which will be introduced later.
3. The operation and management layer is responsible for the operation and configuration management of the system. Here we can see operator stations, servers, and even QCS systems commonly used in the paper industry.
4. At the application management level, we can see factory asset management, digital video management, factory models, etc. It is also connected to the internet via a firewall. On the internet, we can see the factory database (PHD), the network server, the Esever security device integrated with EBI, and the wireless system.
III. DCS and PKS
After reading the above two sections, you should now have a clear understanding of the relationship between DCS and PKS. Honeywell's latest DCS system is extremely powerful, integrating personnel with process control, operations, and asset management. It is an advanced industrial automation system.
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