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WEBControl Global features news and analysis of process control and automation technology to help managers and engineers maintain and optimize systems for today's process industries.
Top 50 Automation Companies of 2021: Green Muscles In
WEBNov. 8, 2022. The Top 50 global and North American automation suppliers fend off recession with sustainability and digitalization. Larry O'Brien, Chantal Polsonetti, Mike Guilfoyle. The automation marketplace proved its resilience again in 2021 and returned to pre-pandemic levels. Despite advances in project engineering that reduced cycle times ...
How valve failure modes interact with controller actions and …
WEBDec 9, 2021 · Loop Control Distributed Control PLCs & PACs SCADA Multivariable Control Industrial Computers AI & ML. Manipulate. Motors Valves Actuators Drives. Visualize. HMI Operator Interface Alarm Management Recorders Data Acquisition Mobile Access. Network. Wireless Industrial Networks I/O Systems Power Supplies Remote Access. Manage.
Dos and don'ts of control room design | Control Global
WEBApr 26, 2019 · A control room that has no room for future expansion of people or equipment. Control rooms with poor lighting, leading to employee complaints and higher rates of absenteeism. Noisy, congested control rooms with sub-optimal workflow adjacencies. Delays in design and construction schedules required to address changes.
The Safety Instrumented Function: An S-Word Worth Knowing
WEBSep 16, 2003 · The term "safety instrumented function" or SIF is becoming common in the world of safety instrumented systems (SISs).It is one of the increasing number of S-words--SIS, SIL, SRS, SLC, etc.--that are coming into our safety system terminology. The definition of a SIF as provided in IEC standard 61511, "Functional safety: Safety Instrumented Systems for the process industry sector," leaves a bit ...
Testing a First-Order Plus Deadtime model | Control Global
WEBDec 8, 2016 · A first-order plus deadtime (FOPDT) model is a simple approximation of the dynamic response (the transient or time-response) of a process variable to an influence. It’s also called first-order lag plus deadtime (FOLPDT), or “deadtime” may be replaced with “delay,” changing the acronym to FOLPD. The FOPDT model is often a reasonable ...
Automatic tank gauging 101 - Control Global
WEBMar 15, 2021 · Automatic tank gauging 101. March 15, 2021. From measurement accuracy to lifecycle costs, the key considerations to keep top of mind. Keith Larson. The purpose of tank gauging is to measure the contents of tanks and vessels for inventory control and custody transfer. Most process plants have tanks that hold feedstock or …
What does good control room design look like? | Control Global
WEBJul 14, 2016 · Likewise, rather than an afterthought, good control room lighting should be as integrated into the design as the placement of the ceiling, walls and floor. Optimum lighting demands quality ambient, uniform illumination, which is a combination of fixtures such as indirect, task and suspended lighting (Figure 4).
Rangeability of equal percentage control valves - Control Global
WEBSep 12, 2013 · Figure 1: Equal percentage valves are used to provide stable control on heat transfer loops by compensating for the process gain that drops with load by its increasing their gain, so that the loop gain stays constant at around 0.5. Relationship between percentage of valve stroke and percentage of flow. Figure 2: At constant ΔP, the Cv of an ...
Ways to improve split-range control - Control Global
WEBAug 6, 2019 · For tight control at the setpoint, overlap the transition point. For example, the cooling valve can remain open from 0-51% of output, and the heating valve can start opening at 49% through to 100%. You lose a little efficiency between 49% and 51%, but ensure a smoother transition.
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