Jump to content

Search the Community

Showing results for tags 'opc ua'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


  • Our Community
    • Come on in!
  • News and Announcements
    • UniLogic 2021-- UniCloud IIoT Cloud Platform, EtherCAT & more!
    • VisiLogic:9.8.64 - Link to mobile app, Ladder: 2x the Space!
    • New!!! ***** U90 Ladder*****
  • UniStream HMI + PLC Programmable Controllers & UniLogic Software
    • UniStream: Hardware
    • UniLogic Software
    • UniLogic UDFBs
    • Industry 4.0, IioT, MQTT, OPC UA
  • Vision, Samba, Jazz and M90 PLC + HMIs & Software
    • Vision & Samba PLC + HMI Controllers & VisiLogic Software
    • Jazz, M91 PLCs and U90Ladder
  • Motion! Servo Drives, Motors, Actuators, & VFDs by Unitronics
    • Motion: Unitronics Servo Drives, Motors, Actuators, VFDs--by Unitronics
  • UniCloud: the end-to-end IIoT Platform for Unitronics Controllers
    • Everything UniCloud!
  • Software Utilities
    • SD Card Suite
    • Remote Operator
    • Remote Access
    • DataXport and DataXls
    • UniDownloader
    • UniOPC
    • UniDDE
  • Utilities for .net and Visual Studio
    • Unitronics PCOM Protocol
    • COM Object ActiveX .dll
    • .NET driver
  • Project Design
    • ...I have a project...what hardware do I need?
  • User Application Stories
    • Just finished a great project?
  • Everything HMI!
    • UniLogic: HMI Design Inspiration
    • UniLogic: Graphics, from Community!
    • VisiLogic--HMI Design
  • Tips and Tricks
    • Best Programming Practices
    • Tips and Tricks
  • Job Board
    • Projects seeking Programmers
    • Programmers seeking Projects
  • General Discussion
    • We're Listening...
    • The Lounge
  • News and Announcements Copy


  • Unitronics' Blog: PLCs, HMIs and more
  • Saragani's Blog
  • Simon's Blog
  • Ash Neilson's Blog
  • Joe Tauser's Blog
  • Unitronics en Español
  • Powered by AMPS
  • Alldrives UK's Blog
  • Unitronics, Howman Style
  • PLCNewbie's Blog
  • Telestar Automation Blog
  • Webinars Collection
  • Tim's Corner
  • Blog
  • TELESTAR (Italian)
  • i4 Automation
  • i4 Automation (UK)
  • Unistream UDFB's


  • From Headquarters: Sample Applications
    • From Headquarters: VisiLogic
    • From Unitronics: U90 Ladder applications
  • User-submitted Applications
    • From Users: VisiLogic applications
    • From Users: U90 Applications


  • Articles
    • Forum Integration
    • Frontpage
  • Pages
  • Miscellaneous
    • Databases
    • Templates
    • Media

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...


  • Start





Website URL







Found 7 results

  1. Hi. After i added/enabled OPC UA in the plc and added one tag. Each time i make a change in the plc, i always have to reset it while downloading one small plc code change. In this example, i added a new local variable called "AAAAA" and added this rung and this small code. Before small changes like this, i could just download without reset the plc.
  2. Hey Guys, The Title really says it all.. But is there a tag limit either by STRUCT or Element for the Unistreams OPC UA Server? If there is a limit, is it based on the hardware? Cheers
  3. Hi all, I have the following question. In a research Project we want to reach connectivity between (older) machines. For that, we want to make data from a PLC V430 available by using OPC UA. As V430 is not OPC UA-able, we want to connect the PLC to a RaPi and implement an OPC UA Server there. For that, can you please tell me, whether the communication between PLC V430 and RaPi is possible? What is the best way to communicate, Modbus tcp? Thank you very much for your Responses!
  4. I'm working with OPC/UA right now and just to clarify a few things: 1) The existing help file [September, 2019] mention of the certificate in the PLC [UniApps->Network-> (2nd Page)-> OPCUA] may or may not be present in there. It depends on the OPC/UA Client program. 2) The generation of the OPC/UA certificate appears to be created/generated when the PLC is first powered up. In order to get the OPC/UA Client to connect I had to download the program and then reset/reboot the PLC. 3) If you plan to implement OPC/UA do yourself a favor and wrap all of your tags into one or more Structs. You can add Structs to the OPC/UA Address Space. Otherwise you have to add the tags one at a time. For my existing project that means adding 168 tags by hand. And of course I find it necessary to have the OPC tag name match that of the 'source' tag exactly. That means at least 600 actions to add them. [I batch process similar to that of the MODBUS configuration would come in handy. Hint Hint !!!]. If anyone has any additional tips/tricks/faqs please add them.
  5. UniLogic 1.28.26 with UniStream USP-070-B10. After following the instructions to setup a OPC server, the certificate is not appearing in the UNI Apps OPC UA window.
  6. Hi Dears, I can identify a lot of benefits including OPC UA server capabilities directly at CPU level. This could standardize OPC communications for OEM vendors and leveraging data collections in upper data layers. Do you have plans to integrate that functionality ? Congratulations including MQTT protocol, this is also a very good progress!!! I tried in the pass define an standard XML (web methods module) to communicate, but this is definitely much better. Regards. Marcos.
  7. OLAF

    OPC DA or OPC UA

    Dear All, Does someone knows which protocol is implemented in the UniOPC package: UA (Unified Architecture) or DA (Data Access)? For one of our test installations we need to connect a V1040 PLC via OPC UA to a fuzzy logic controller that generates variable setpoints we need for our process. Thanks a lot. Olaf
  • Create New...