You are not registered yet. Please click here to register!

plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!

Go Back - Interactive Q & A > - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Thread Tools Display Modes
Old September 6th, 2013, 02:55 PM   #1
United States

tmummert is offline
Join Date: May 2013
Location: Red Lion
Posts: 5
Sharing one webpage with multiple S7-1200 CPUs

I currently have three S7-1214C CPU's running multiple lines of presses. Our company is trying to avoid using any HMI's, to display information generated by the tags on the CPU. The webpage is very good for this application, but it would be great to get all three CPU's to display their respective data on one webpage.
So far, I have struggled to find any information on sharing tags directly to the webpage so I'm thinking I will need to share the necessary tags with whichever of the three CPU's I choose to host the webpage from. If this is the only way to do it, I'm not sure of the best method to share the tags. Thank you in advance.
  Reply With Quote
Old September 6th, 2013, 03:37 PM   #2
United States

quadPLC is offline
Join Date: Feb 2010
Location: Milwuakee
Posts: 51
I have used the webpage functionality in the S7-1200 quite a bit and I don't think there's going to be a way to do this without having your host PLC talk gather the data from the other PLCs and create a concatenated list of all the data.

This is because the webserver that returns real-time data processes the tag names at the time of the web request. There's no way that I know of that would let you interface with multiple PLCs.

If all 3 devices have the same interface, you may be better off creating a user data type (UDT) of what you want to display, and make a DB of 3 of those and have each PLC populate that. Then the master PLC could get it with a GET block or maybe via Modbus (I've never done inter-PLC comms like this).

EDIT: Reading what you're doing, I think your best bet is investing in an OPC server or application service using Modbus to read the data and aggregate the information. What happens if the master PLC goes down? I've used Kepserver, Wonderware, as well as free Modbus libraries like with great success.

Last edited by quadPLC; September 6th, 2013 at 03:42 PM.
  Reply With Quote
Old September 6th, 2013, 03:41 PM   #3
United States

tmummert is offline
Join Date: May 2013
Location: Red Lion
Posts: 5
Thanks, that's kind of the impression I was getting.
  Reply With Quote
Old September 6th, 2013, 04:17 PM   #4
Lifetime Supporting Member
United States

Mark- is offline
Join Date: Nov 2008
Location: Texas
Posts: 663

PeakHMI can access all the PLCs and display the tag data in pre-built web pages. There are also other options with the software.
Good luck,

  Reply With Quote
Jump to Live PLC Question and Answer Forum


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
S7 1200 programming software johnmck66 LIVE PLC Questions And Answers 5 October 7th, 2011 06:32 AM
Sharing S7 projects. What must I do? Peter Nachtwey LIVE PLC Questions And Answers 19 January 17th, 2007 05:21 PM
S7 - Problem after modifying multiple instance FB. RMA LIVE PLC Questions And Answers 17 April 11th, 2005 02:44 AM
S7 - Multiple FC calls in a loop RMA LIVE PLC Questions And Answers 4 January 31st, 2005 09:29 AM
Copying multiple Networks in S7 RMA LIVE PLC Questions And Answers 5 December 16th, 2004 02:21 AM

All times are GMT -5. The time now is 08:12 AM.