How to Interpret DCS and PLC Symbols on a PampID

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▶ C'mon over to https://realpars.com where you can learn PLC programming faster and easier than you ever thought possible! • ============================= • ▶ Check out the full blog post over at • https://realpars.com/p-id-symbols/ • ============================= • In this video, we’re going to talk about how to correctly interpret PLC and DCS symbols on a P ID. • Anybody such as Instrumentation Control Engineers, technicians, and maintenance personnel working on industrial plant control systems depend heavily on P ID’s. • A P ID is like a road map telling us what the instruments and devices are, where they are located, and how they interact with the rest of the plant. • Original symbols and terminology for P ID’s were created long before the introduction of PLC’s and DCS’s in-plant control. • Before computers came along, process control loops were stand-alone. In other words, each process had its own individual controller. • Control rooms were massive and had sprawling control panels with lots of controllers and other devices such as strip chart recorders and switches. • Today’s industrial processes are controlled by computerized systems using virtual controllers found in PLC’s and DCS’s. • New control rooms are filled with HMI’s and keyboards connected to a DCS or a PLC system. All of this computerization required that new P ID symbols had to be developed. • If you recall, stand-alone instruments are indicated on a P ID by a circle with a tag number. • The horizontal bar across the middle of the circle indicates the physical instrument resides in a primary location accessible to an operator on the main control panel. • If we take that same symbol and draw a box around it, it now means that it is no longer a physical instrument. It is now part of a shared display and shared control in a DCS. • PLC symbols don’t show up on P ID’s nearly as often as DCS symbols. But, when they do show up, they are drawn as a diamond inside a box. • All you have to know is that the symbol represents a software instruction to perform some function in the plant. • ============================= • You might want to review 2 of our other videos called How to Read a P ID (https://realpars.com/p-id/) and What is an HMI? (https://realpars.com/what-is-hmi/). • ============================= • Missed our most recent videos? Watch them here: • https://realpars.com/dp-level-measure... • https://realpars.com/transmitter-wiring • https://realpars.com/wireless-radio-m... • ============================= • To stay up to date with our last videos and more lessons, make sure to subscribe to this YouTube channel: • http://goo.gl/Y6DRiN • ============================= • TWEET THIS VIDEO https://ctt.ac/LvV5z • ============================= • Follow us on Facebook: / therealpars • Follow us on Twitter: / realpars • Follow us on LinkedIn / realpars • Follow us on Instagram / realparsdotcom • #P_and_ID #PLC #RealPars

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