Member Login
member
passwd
remember me on
this computer.

- join now -
- forgot username or password? -

Search

Jump to a Date

Sponsored Communities
Cool stuff
Select a topic of interest:
...and press:
Neat Stuff
Control.com Stuff

Visit our shop for nerds in control lifestyle products.

Fortune
A sine curve goes off to infinity or at least the end of the blackboard
-- Prof. Steiner
RSS Feed
RSS feed Use this link to get an RSS feed of the Control.com article flow, for private, non-commercial use only:
www.control.com/rss/
To get a personalized feed, become a member at no cost.
Select a Page Style
Select one of the following styles:
- BluFu
- Classic
(cookies required)
advertisement
from the Automation List department...
Data Logger data to SCADA
PLCs and related questions. topic
Posted by Mutttt on 6 August, 2008 - 12:40 am
How do I get time stamped data from a logger/RTU into my trends on an Intouch or similar SCADA?


Posted by Adriel Michaud on 7 August, 2008 - 12:44 am
Depends entirely on the RTU or protocol used. If your HMI does not directly support the RTU or device, you can use an OPC Server to access your data. Note that some protocols or devices cannot provide a timestamp, so the timestamp may come from the PC that the OPC Server sits on. Ask your OPC vendor.

MatrikonOPC has a wide variety of OPC Servers here: http://matrikonopc.com/opc-drivers/index.aspx

Adriel Michaud
MatrikonOPC


Posted by Burnikell on 8 August, 2008 - 1:44 am
Hi Mutttt,

I'd go along with the same philosophy that Adriel suggested. In the past I've used the same approach for getting data out of Chessel chart recorders and Eurotherm RTUs. On these occasions I needed to get the data from the instrument using a plug in expansion card that allowed connection between the device and a PC using a MODBUS protocol. On the PC I installed an OPC Server which then allowed me take the data into other applications (in my case an AspenTech IP.21 historian).

In my case the timestamp could be extracted as part of the data transferred from the recorder/RTU, however as Adriel states it is dependant upon what the device allows, and if it doesn't support timestamp then the OPC server can append a timestamp.

Regards,

Burnikell

From Control Engineering magazine...
Related articles from Control Engineering magazine
Above articles copyright 2009 Reed Business Information. Subject to its Terms of Use.
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2009 Control Technology Corporation. All rights reserved.

Users of this site are benefiting from open source technologies, including PHP, MySQL and Apache. Be happy.

Internet Explorer 6.0 Fix

Advertisement
Our Advertisers
Help keep our servers running...
Patronize our advertisers!