×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Data transfer rate calculate
3

Data transfer rate calculate

Data transfer rate calculate

(OP)
Hi gentlemen,

For plc whatever type with I/O modules. How can calculate data transfer rate? To determine suitable ethernet switch? Connect into plc



Is there any example or reference I will be appreciate

Br
John

RE: Data transfer rate calculate

2
Most industrial ethernet is 100 Mb/s with 1Gb/s just starting to appear. No matter how fast the ethernet is, the limiting factor will be when the send and receiver can get around to processing the next pack.
In some cases the PLC itself is the bottle neck because it can't send and receive data fast enough from the Ethernet chips. I don't like Ethernet modules. In this case the PLC bus will be the limiting factor.
PCs can use DMA to transfer data to and from the Ethernet chip. Some microcontrollers have the Ethernet functionality built in. The microcontrollers with built in Ethernet are very efficient.

Wire speed is not the only limitation. If there are many devices on the switch then how it handles collisions is important. You should read this
https://en.wikipedia.org/wiki/Cut-through_switchin...

Some PLCs have limitations on how many connections it can have open. This is not a problem when only communicating with a few devices.
It isn't as simple has just comparing wire speed.




Peter Nachtwey
Delta Computer Systems
http://www.deltamotion.com
http://forum.deltamotion.com/
IFPS Hall of Fame Member

RE: Data transfer rate calculate

(OP)
Thank you pnactway for your input

According my understand cani suppose the Data speed based on port built up on PLC?

Am I right?
If yes how can I know data rate at ethernet port
Is it 10, 100, 1g bits / sec?

If it's mpi how much the speed will be?

Actually I looking to sizing hardware harmonically when I get different plc protocols

To prevent data collapse in server database or data warehouse.
If there is example will be appressiats
Thank you in advance

Warm regards
John

RE: Data transfer rate calculate

Quote:

If yes how can I know data rate at ethernet port

Again, read the manual. That said, the data speed is dependent on what the PLC is ACTUALLY DOING!!!!! If it's measuring a single pressure once a second, the data rate is something like 32 bps, while a PLC monitoring an entire factory's worth of measurements might be maxed out. Ask the programmer what the program is doing and how much data it's transmitting

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm

RE: Data transfer rate calculate

6ES7318-3FL01-0AB0 has one ethernet connection and it can be used either as ProfiNet bus or just a Industrial Ethernet connection.
Maybe not so clear in the documentation.





If your CPUs are using the Ethernet as ProfiNet you will need a additional CP343-1 if you want a Ethernet connection.

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

RE: Data transfer rate calculate

(OP)
Thank you redsnake. For your clarification.
And valuable input


Best regards
John

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

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.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close