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What is DCS?

A Distributed Control System (DCS) is a particularly designed automated control system that consists of control elements that are geographically scattered throughout the plant or control region.

It varies from centralised control systems in that a single controller in a central location handles control, but with DCS each processing element, machine, or set of machines is handled by a dedicated controller. DCS is made up of a large number of local controllers located across the plant control area that are linked by a high-speed communication network.

In this article, we are going to discuss Honeywell’s various DCS models and its features.

Honeywell is an American multinational company headquartered in Charlotte, North Carolina. It was founded in 1906.

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Honeywell DCS models and their features

The main Honeywell DCS models are

• Experion LX
• Experion LCN
• Experion PKS C300
• Experion PlantCruise

Experion LX

Experion LX is the ideal platform for allowing customers to expand their scope from process control and management to encompass personnel and assets at any time, as well as to combine the resources of their whole business operations.

Experion LX provides tried-and-true technology with the appropriate agility for increased dependability and sophisticated control:

Gives users the choice of modular control platforms based on Series 8 and ControlEdge for better integration with a variety of industrial applications.

How does Experion LX works?

Experion LX provides a comprehensive control package built on cutting-edge controllers and technology, allowing for enhanced communication and seamless plant-wide operation. The main attributes of this remedy are as follows:

• Prebuilt templates and built-in function blocks
• Rich function libraries that make control techniques more easily
• Application development with Custom Algorithm Blocks (CABs) support to meet industry- and application-specific criteria
• Control Builder, Enhanced Bulk Builder, Quick Builder, Smart Reporting, and HMI are examples of tools that are easy to use.
• Pack of Web Solutions
• Alarm management technologies including dynamic alarm suppression, alarm tracking, and alarm shelving

What are the features of Experion LX?

• It gives users the choice of modular control platforms based on Series 8 and ControlEdge for better integration with a variety of industrial applications.
• Incorporates innovative predictive control technology based on models for loop-control optimization.
• Through Experion Direct Connect Station, ensures there is no “loss of vision” of the key process.
• Greater dependability is guaranteed by using Honeywell’s patented Fault Tolerant Ethernet (FTE) technology.
• Uses IT-enabled methods to boost operations and performance (e.g., virtualization, data mobility, remote operations)
• Verification of the change control process for regulatory compliance
• Simplifies the functionality of engineering and maintenance

Experion LCN

With standards-based functionality, regulatory support capabilities, and integrated operations from the field through the plant to the business level, Experion LCN delivers a secure, seamless integration with the Experion PKS architecture.

How does Experion LCN works?

Experion LCN further facilitates continuous innovation for Honeywell clients by enhancing the capabilities of the Enhanced TPS Node. A new ELCN Bridge connects Experion to Classic Coax LCN using the tried-and-true Experion Fault Tolerant Ethernet (FTE) architecture.

One LCN node at a time, after this connection has been made, can be removed from the LCN coax connection. For virtualization to work, just one redundant ELCN Bridge pair is required, as opposed to a hardware connection for each Experion TPS Node.

Experion PKS C300

The unified architecture of Experion PKS combines cutting-edge distributed control system (DCS) technologies with cutting-edge software to enhance process performance, corporate agility, asset management, and employee productivity.

Honeywell’s unified control system for process, business, and asset management, the Experion Process Knowledge System (PKS), aids industrial producers in boosting their profitability and productivity. With an advanced automation platform solution and creative application integration, Experion goes far beyond the distributed control system (DCS) functionality to give customers greater business performance and peace of mind.

Experion PlantCruise

Based on Honeywell’s highly regarded Experion Process Knowledge System (EPKS), PlantCruise by Experion effectively serves the requirements of Honeywell users.

HONG KONG SAUL ELECTRICAL LIMITED
Mr. Lai (Sales Manager)
WhatsApp:+86 17750010683
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Email: 3221366881@qq.com
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LCN stands for Local Control Network. It was developed by Honeywell.

Honeywell Process Solutions (HPS) has introduced the Experion Local Control Network (LCN) solution. This product enables Honeywell’s traditional TotalPlant Solution (TPS) control system to be incrementally upgraded to allow for connection with Experion PKS. With Experion LCN, Honeywell provides a path for continual innovation to customers all over the world. While exploiting existing automation assets, industrial facilities can progressively transition their legacy control system to become part of a new, modern solution.

The concept of Local Control denotes the existence of many logical networks within a single physical network. Geographical area, time, up and downlink capacity, and delay can all be used to build logical networks. You are given established performance templates to utilize from non-public networks as an enterprise. You can distribute resources to your users on the Local Control interface in the same way that receptionists grant access to buildings to guests, their own workers, subcontractors, and so on.

How does it work?

Extending on the capabilities of the Enhanced TPS Node, the Experion LCN enables Honeywell customers to benefit from continual innovation. A new ELCN Bridge connects Experion to Classic Coax LCN using the proven Experion Fault Tolerant Ethernet (FTE) infrastructure.

The LCN coax connection can be disconnected one LCN node at a time once this connection is created. To allow virtualization, only one redundant ELCN Bridge pair is required instead of a hardware connection for each Experion TPS Node. ​

What problems does ELCN solve?

Honeywell’s gradual upgrade to Experion LCN in process modernises the control system architecture and allows the Industrial Internet of Things (IIoT by Honeywell). This technique keeps controls secure and dependable while upgrading and growing with the most advanced technologies. It keeps established, dependable systems running longer, increase uptime, and protects hardware and network infrastructure investments.

What are the functions of LCN?

• In most cases, the first function mentioned is crisis priority management. This means that in congested networks, you can manually or automatically adjust user priorities to provide access to those who need it. This is crucial in catastrophic events, but it is not the most important aspect in our opinion.
• Access to services is a key component of local control; not every user/app requires access to the same performance level at the same time. You can make these choices on your own through the Local control system whenever you need to.
• Another important feature is the ability to view network status in your own location. If there is an issue in your local network, you can view the current status. You may also see where your users are in the network, how much capacity they are consuming, and how much they are entitled to in the local control system. Local control systems can also ensure that the network is not overloaded and that service level agreement (SLAs) are met.
• Profile modifications can be performed automatically using the API to Local control. On a dynamic basis, changes can be tied to time and location. A geofence, for example, can be created. Depending on how it is used or the surroundings, a single device may employ a different profile. The user does not have to be a human, and IoT applications can also be handled locally.

CHARM technology This unprecedented flexibility comes from characterization module (CHARM) technology, which allows field wiring of any signal type to be terminated anywhere. A CHARM is simply a single-channel component with an A/D converter and signal characterizer inserted onto the terminal block where field wires are landed. Each device can be landed anywhere on the strip regardless of its signal type: AI 4-20mA, AO 4-20mA, AI 0-10V, TC, RTD, DI Dry or Namur, DO High Side, Relays Contact Outputs or Isolated DI and DO for higher currents or higher VAC Voltages. Simply click in a CHARM with the corresponding signal type, and the landing is done. After the CHARM is in place, the channel is electronically marshaled to any controller in the system. This means no marshalling cabinet or cross-wiring, fewer wires, much less work, and fewer contact points for potential failures.

Electronic marshalling and the CHARM technology have proven thier flexibility in installations, delivering up to 50% wiring savings over traditional wiring as well as eliminating traditional marshalling cabinets and cross-wiring. At the same time, they increase reliability while reducing maintenance costs, responding quickly and easily to late changes with no impact on startup scheduling.

Intrinsically Safe CHARMs The addition of intrinsically safe (IS) CHARMs provides significant savings with Electronic Marshalling, with the added intrinsically safe circuitry for field wiring into hazardous areas, including Zone 1, Zone 0 or Class 1 Div1. I/O in hazardous areas traditionally requires costly explosion-proof mounting or isolation barriers, along with added space for barrier and termination, and ongoing maintenance to ensure compliance with safety requirements. IS CHARMs deliver a reduced footprint and eliminate the need for separate barriers and the associated inter-cabinet wiring. A smaller footprint and fewer connections improve reliability and deliver significant cost savings.

IS barriers are integrated inside the IS CHARM to provide single channel fault isolation, as well as electrical isolation and energy limiting circuitry that meets IEC Ex ia ratings. First available IS CHARMs signal types are: IS AI 4-20mA HART, IS AO 4-20mA HART, IS DI Namur, and IS DO 24 VDC.

HONG KONG SAUL ELECTRICAL LIMITED
Mr. Lai (Sales Manager)
WhatsApp:+86 17750010683
Phone: 17750010683 (same WeChat account)
Email: 3221366881@qq.com
https://www.saulelectrical.com

What is Emerson DCS?

The DeltaV Distributed Control Solution (DCS) is a simple automation system that reduces project risk and simplifies operational complexity. The cutting-edge range of products and services improves plant performance through intelligent control that is simple to operate and maintain.

In this article, we are going to discuss various DCS systems manufactured by Emerson. Emerson Electric Co is an American-based company. It is one of the leading DCS manufacturing company headquartered in Ferguson, Missouri. The company was formed in 1890.

Emerson’s DCS System

Delta V

DeltaV is Emerson’s Digital Automation system, which is utilised to optimize plant operations by utilising today’s predictive technologies in a simple, intuitive, and interoperable manner to integrate people, processes, and production within an end user context.

DeltaV Live is the most modern DCS HMI, based on cutting-edge graphics technologies, and the only HMI that adheres to W3C (World Wide Web Consortium) standards. HTML5 lays the groundwork for ubiquitous use across numerous platforms such as desktops, tablets, and phones, allowing users to select the best platform or device for their needs. DeltaV Live displays are entirely scalable and stretch to fit numerous screen sizes with no loss of sharpness thanks to scalable vector graphics.

The DeltaV distributed control system (DCS) optimises your operations by connecting your people, processes, and production in a simple, intuitive, and interoperable manner. The DeltaV DCS delivers systems and tools to ensure decision integrity, allowing you to run your organisation to its greatest capacity. Emerson created the DeltaV DCS to make duties easier over the life of your facility.

For alarms, batch, advanced control, safety, and historians, the DeltaV DCS uses a single-environment configuration. The use of out-of-the-box templates and modular configuration libraries necessitates less specialist knowledge, resulting in simple configuration and decreased testing.

DeltaV Electronic Marshalling technology enables you to place field cabling wherever it is required, regardless of signal type or control schemes. To accommodate modifications, Electronic Marshalling allows you to divorce the process design from the I/O infrastructure architecture.

Emerson’s development and design of operator screens are based on Human Centered Design (HCD). In an easy-to-use visual solution, you may quickly build strong operator interfaces and gain access to the most relevant information.

Advanced control applications are designed for control system engineers and include incorporated intelligent control that may be installed with minimal configuration and maintenance. All of the technologies and tools are built within the DeltaV system. There is no need for data mapping. The apps are not optional; they are built into the DeltaV DCS.

Three options to meet a wide range of needs

• DeltaV Continuous Historian, which handles the majority of in-system history data collecting needs.
• OSIsoft-powered Advanced Continuous Historian for better in-system data collecting.
• Integration with an embedded or external OSIsoft PI Server for enterprise-wide history data collecting, with DeltaV engineering tools set for ease of use and effective change management.
• Compare current events to historical trends.

HONG KONG SAUL ELECTRICAL LIMITED
Mr. Lai (Sales Manager)
WhatsApp:+86 17750010683
Phone: 17750010683 (same WeChat account)
Email: 3221366881@qq.com
https://www.saulelectrical.com

What is Invensys DCS?

A distributed control system (DCS) is a type of digital automated industrial control system (ICS) that uses control loops that are geographically scattered throughout a factory, machine, or control region.

In this article, we are going to discuss DCS developed by Schneider Electric.

Schneider Electric SE is a multinational corporation based in France that specialises in digital automation and energy management. It was founded in 1836.

EcoStruxure Foxboro DCS

EcoStruxure Foxboro DCS Control Software 7.1 has been launched by Schneider Electric. The new software, with additional features and an improved HMI, is intended to simplify engineering and improve the user experience while employing EcoStruxure Foxboro DCS to generate measurable operational benefits safely. The n software version is on show in San Antonio, Texas, at Schneider Electric’s annual EcoStruxure Foxboro user group conference.

The Foxboro Evo technology eliminates process risks and protects profitability. Integration with the world’s premier safety system, as well as a three-pronged cybersecurity approach, assist ensure minimal downtime and uninterrupted production.

Advanced troubleshooting, situational awareness, decision support, and proactive maintenance tools enable every team member to work faster, more accurately, and more agilely to generate production efficiencies that improve the plant’s operations and profits.

The Foxboro EvoTM Process Automation System (DCS) portfolio from Schneider Electric includes termination boards and interface modules as well as solutions for HART, FOUNDATION Fieldbus, and PROFIBUS PA.

The Foxboro Evo HMI allows for simple visualisation of historical trends, as well as ad hoc analysis and a single data repository. Operators obtain a real-time view of all important actions, allowing them to make better decisions and maximise plant performance.

With simple shapes and relevant colours, as well as reliable analogue signalling of objects, situational awareness graphics reduce operator fatigue and provide a broad picture of plant activities. Configurable alarm management analyses enable users to reprioritize alerts depending on changes in operating conditions, resulting in faster comprehension, action, and resolution.

Control and optimization are taken to new heights with operator visualisation based on market-leading InTouchTM software, which provides plantwide visibility to third-party devices, applications, and systems. Synchronized role-based event replies, as well as regulated processes and audit trails, provide clear direction.

HONG KONG SAUL ELECTRICAL LIMITED
Mr. Lai (Sales Manager)
WhatsApp:+86 17750010683
Phone: 17750010683 (same WeChat account)
Email: 3221366881@qq.com
https://www.saulelectrical.com

PID control is closed loop control system used widely in industrial automation. PID stands for Proportional-Integral-Derivative control. PID control is the combination of these three controllers.

Conventional ON/OFF controllers are used only where we needed two-stage control operation, which always produces offset in the output. Oscillating nature of ON/OFF system between On and Off limits its usage and hence, it is replaced by PID controller.

Proportional control:

Proportional control never reaches a steady state condition, so the controller requires a manual reset. A fundamental limitation of proportional control has to do with its response to changes in setpoint and changes in process load.

A “load” in a controlled process is any variable not controlled by the loop controller which nevertheless affects the process variable the controller is trying to regulate. In other words, a “load” is any factor the loop controller must compensate for while maintaining the process variable at setpoint.

Process response for PID is shown in above figure. Every process has a fixed setpoint, every controller tries to maintain the PV ( process variable) at the SP( setpoint). The PID controller takes a control action when the PV reaches the setpoint. The incoming PV will definitely have an impact on the process output. This will affect the PV in the output to produce an offset below or above the setpoint.

Integral / Reset control :

If we wish to restore the process to the setpoint after a disturbance then proportional action alone will be insufficient. Integral control system integrates the errors in the process until the error becomes zero.

Process response and reset action for an integral controller is shown above.

If the integration happens at too fast a rate, the controller’s output will “saturate” either high or low before the process variable can make it back to setpoint.

If we wish to restore the process to the setpoint we must increase the input over and above that required to restore a balance. The additional input must replace the lost process parameter and then revert to a mass balance situation to maintain the PV at the setpoint.

The additional action for the integral signal is reset action, it reset the process to a setpoint, reset action is the integral of an error signal to the integral controller action that it is possible to operate the control loop on integral action alone, without proportional. Typically, though, process controllers implement some form of proportional plus integral (“PI”) control.

Derivative/ Rate control :

The derivative is the rate of change of the variable with respect to the other variable. A controller with derivative action looks at how fast a variable change per unit of time, and take control action proportion to the rate of change variable.

Derivate control doesn’t look into the present PV value to control the output, but track the rate of change of variable and control the output with respect to it. It can be seen that the derivative action gives a large, immediate, control signal, which will limit the deviation. The proportional action is then superimposed upon this step. When the error stops changing derivative action ceases.

The rate response gives an immediate control signal, which will be equal to what the proportional response would be after some time. Derivative units are given in minutes.

If the process variable starts to change at a high rate of speed, the job of the derivative action is to move the final control element in such a direction as to counteract this rapid change, and thereby moderate the speed at which the process variable changes. In simple terms, derivative action works to limit how fast the error can change.

PID Control advantages:

• Increased productivity
• Decreased equipment strain.
• Increased process safety