I need to assign tags for a pressure control loop using a VFD for the final element. We have a PT for the input and a PIC DCS control tag but I'm not sure what to use for the final element tag. I know that its typically client preference but thought I'd ask for opinions.
RE: Instrument Loop tags for Pressure Control loop with Variable speed pump motor as final element
Wow...I was the originator of that question many years ago.
I now lean toward the PIC bubble linked to an Instrument Bubble with SC in it, which represents the VFD. The SC bubble is linked to the pump symbol (Or motor symbol if it's there).
I've also used the PIC bubble linked to a box with VFD written in it, which is then tied to the pump/motor...based on customer's previous designs.
If you use the SC bubble, it's helpful to write "VFD" text next to the bubble for clarity.
______________________________________________________________________________
This is normally the space where people post something insightful.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Early Supplier Involvement has long been a strategy employed by manufacturers to produce innovative products. Now, it almost seems like a necessity. Because decisions made in the design phase can positively affect product quality and costs, this can help add value to OEM bottom lines. This white paper will discuss many facets of ESI, including why it’s so valuable today, what challenges limit the benefits of ESI, how cost is impacted, and more. Download Now
This white paper describes what we see as the best practices to support a sustainable engineering process for autonomous vehicle design. It exposes how to use simulation and testing in common frameworks to enable design exploration, verification and validation for the development of autonomous cars at a system, software and full-vehicle level to drive a mature product development process for automated driving. Download Now
As a 3D printer owner, you may be already reaping the benefits of 3D printing, such as rapid production, design freedoms and easy access to fresh prints of the machine. We dive into scenarios to help you decide when you need to outsource your project to a service provider.
Download Now
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
Talk To Other Members
RE: Instrument Loop tags for Pressure Control loop with Variable speed pump motor as final element
I now lean toward the PIC bubble linked to an Instrument Bubble with SC in it, which represents the VFD. The SC bubble is linked to the pump symbol (Or motor symbol if it's there).
I've also used the PIC bubble linked to a box with VFD written in it, which is then tied to the pump/motor...based on customer's previous designs.
If you use the SC bubble, it's helpful to write "VFD" text next to the bubble for clarity.
______________________________________________________________________________
This is normally the space where people post something insightful.