# \#opc-ua **URL:** https://tech-community.robotics.abb.com/tag/opc-ua/1023.md [Latest](https://tech-community.robotics.abb.com/latest.md) · [Categories](https://tech-community.robotics.abb.com/categories.md) · [Tags](https://tech-community.robotics.abb.com/tags.md) --- ## [I/O signals not showing in OPC UA client](https://tech-community.robotics.abb.com/t/i-o-signals-not-showing-in-opc-ua-client/11872)
**Author:** [@poiuyt](https://tech-community.robotics.abb.com/u/poiuyt)\ **Replies:** 3\ **Last updated:** [November 5, 2025, 10:59am UTC](https://tech-community.robotics.abb.com/t/i-o-signals-not-showing-in-opc-ua-client/11872 "2025-11-05T10:59:22Z")
I managed to establish connection between Robotstudio and UAexpert the OPC UA client I am currently using. The problem is that whenever I go in to the I/O signals folder in the OPC UA client, there are no signals or tags… --- ## [OPC UA on Omnicore controller](https://tech-community.robotics.abb.com/t/opc-ua-on-omnicore-controller/11985)
**Author:** [@bran21](https://tech-community.robotics.abb.com/u/bran21)\ **Replies:** 1\ **Last updated:** [July 18, 2025, 5:13am UTC](https://tech-community.robotics.abb.com/t/opc-ua-on-omnicore-controller/11985 "2025-07-18T05:13:04Z")
I’m working with multiple ABB robots (Omnicore controllers) in RobotStudio and need help setting up the OPC UA communication with a TwinCAT PLC for I/O based handshaking between the robots. (where TwinCAT is the OPC serv… --- ## [IoT Gateway and OPC UA Limitations](https://tech-community.robotics.abb.com/t/iot-gateway-and-opc-ua-limitations/11560)
**Author:** [@jjwempe2](https://tech-community.robotics.abb.com/u/jjwempe2)\ **Replies:** 0\ **Last updated:** [August 21, 2024, 7:38pm UTC](https://tech-community.robotics.abb.com/t/iot-gateway-and-opc-ua-limitations/11560 "2024-08-21T19:38:11Z")
Two questions with details written below: Is an OPC UA client able to write to PERS arrays? Is an OPC UA client able to write negative values to an analog input/output? I can successfully communicate with an IRC… --- ## [How to Read Robot Joint Positions via OPC UA in Visual Components](https://tech-community.robotics.abb.com/t/how-to-read-robot-joint-positions-via-opc-ua-in-visual-components/11180)
**Author:** [@JReinhart](https://tech-community.robotics.abb.com/u/JReinhart)\ **Replies:** 1\ **Last updated:** [July 5, 2023, 6:37pm UTC](https://tech-community.robotics.abb.com/t/how-to-read-robot-joint-positions-via-opc-ua-in-visual-components/11180 "2023-07-05T18:37:28Z")
I am working on simulating an ABB robot in VC. I want to do this by creating an OPC connection which reads the joint positions of a simulated robot in RobotStudio and allows the robot in VC to mimic those positions. I a… --- ## [Writing from virtual controller Profinet signals to PLC through OpcUa](https://tech-community.robotics.abb.com/t/writing-from-virtual-controller-profinet-signals-to-plc-through-opcua/10965)
**Author:** [@dragolollo](https://tech-community.robotics.abb.com/u/dragolollo)\ **Replies:** 2\ **Last updated:** [February 13, 2023, 3:07pm UTC](https://tech-community.robotics.abb.com/t/writing-from-virtual-controller-profinet-signals-to-plc-through-opcua/10965 "2023-02-13T15:07:33Z")
Hello all, I would like to simulate ProfiNet communication between the virtual controller and Siemens PLC using OpcUa. I have configured the OpcUa client in RobotStudio assigning the ProfiNet device to an array of Usint… --- ## [IoT gateway, periodic disconnections with "BadTimeOut" errors](https://tech-community.robotics.abb.com/t/iot-gateway-periodic-disconnections-with-badtimeout-errors/10976)
**Author:** [@DSRTM](https://tech-community.robotics.abb.com/u/DSRTM)\ **Replies:** 0\ **Last updated:** [January 6, 2023, 4:21pm UTC](https://tech-community.robotics.abb.com/t/iot-gateway-periodic-disconnections-with-badtimeout-errors/10976 "2023-01-06T16:21:09Z")
Hi Everyone, we have a IRB6700, IRC5 with PC SDK and IoT gateway 1582-1, using RW 6.13. We’ve installed Aveva Edge through a switch to the IRC5, using IoT gateway 1.2.1. Our IT expert has got the security certs sorted, … --- ## [How to add "IoT Data Gateway" for a virtual controller in RobotStudio?](https://tech-community.robotics.abb.com/t/how-to-add-iot-data-gateway-for-a-virtual-controller-in-robotstudio/10852)
**Author:** [@FrankGumbo](https://tech-community.robotics.abb.com/u/FrankGumbo)\ **Replies:** 1\ **Last updated:** [October 31, 2022, 2:56pm UTC](https://tech-community.robotics.abb.com/t/how-to-add-iot-data-gateway-for-a-virtual-controller-in-robotstudio/10852 "2022-10-31T14:56:58Z")
I use RobotStudio (2022.2, 64-Bit, Version 22.2.9947.0) to run the simulation of a small RAPID program in a virtual controller (ABB.RobotWare-7.7.0). Now, I want to provide the axis values of the robot (IRB6650S\_90\_390\_\_… --- ## [How to visualize RAPID variables of a virtual controller in robotstudio](https://tech-community.robotics.abb.com/t/how-to-visualize-rapid-variables-of-a-virtual-controller-in-robotstudio/10665)
**Author:** [@antonio\_munoz](https://tech-community.robotics.abb.com/u/antonio_munoz)\ **Replies:** 4\ **Last updated:** [March 30, 2022, 8:13am UTC](https://tech-community.robotics.abb.com/t/how-to-visualize-rapid-variables-of-a-virtual-controller-in-robotstudio/10665 "2022-03-30T08:13:29Z")
I have a controller configured in IoT Gateway. It seems all is correct. From an OPC client I can display the tree with the Objects, types and views, but I do not display any RAPID variables. Can someone help me ? !\[i… --- ## [IOT Gateway Doesn't see all RAPID variables](https://tech-community.robotics.abb.com/t/iot-gateway-doesnt-see-all-rapid-variables/10494)
**Author:** [@XNOR](https://tech-community.robotics.abb.com/u/XNOR)\ **Replies:** 1\ **Last updated:** [December 14, 2021, 7:17pm UTC](https://tech-community.robotics.abb.com/t/iot-gateway-doesnt-see-all-rapid-variables/10494 "2021-12-14T19:17:27Z")
Recently connected IOT Gateway to a IRC5 running RobotWare 6.05.02. I then have an ignition gateway connected to the IOT Gateway for an HMI. I can see any variables that are defined PERS but not VAR or CONST. I would ex… --- ## [Data not being shown in client from OPC UA Server](https://tech-community.robotics.abb.com/t/data-not-being-shown-in-client-from-opc-ua-server/10109)
**Author:** [@stefpender](https://tech-community.robotics.abb.com/u/stefpender)\ **Replies:** 4\ **Last updated:** [December 14, 2021, 7:12pm UTC](https://tech-community.robotics.abb.com/t/data-not-being-shown-in-client-from-opc-ua-server/10109 "2021-12-14T19:12:49Z")
I’ve been using the OPC UA server for months now with a virtual controller setting up communications. Today I’m getting error messages “Error creating monitored item on server.” I tried updating the OPC UA server and Rob… --- ## [How the persistent rapid variable changes is tracked in abb opc ua server ?](https://tech-community.robotics.abb.com/t/how-the-persistent-rapid-variable-changes-is-tracked-in-abb-opc-ua-server/10482)
**Author:** [@amitadhikaree](https://tech-community.robotics.abb.com/u/amitadhikaree)\ **Replies:** 1\ **Last updated:** [December 2, 2021, 5:35pm UTC](https://tech-community.robotics.abb.com/t/how-the-persistent-rapid-variable-changes-is-tracked-in-abb-opc-ua-server/10482 "2021-12-02T17:35:51Z")
I have created a persistent variable and is changing periodically in controller. I cannot see that in the dataFeed OPC UA client. The client is connected to server and irc5 is also connected to server. Can someone please… --- ## [OPC UA Server not accessing IRC5 controller tags](https://tech-community.robotics.abb.com/t/opc-ua-server-not-accessing-irc5-controller-tags/10304)
**Author:** [@stefpender](https://tech-community.robotics.abb.com/u/stefpender)\ **Replies:** 1\ **Last updated:** [November 15, 2021, 8:23pm UTC](https://tech-community.robotics.abb.com/t/opc-ua-server-not-accessing-irc5-controller-tags/10304 "2021-11-15T20:23:55Z")
When I use the OPC UA Server with a virtual controller, I have no issues accessing data tags within the IRC5 controller. When I connect to an actual robot, I’m unable to access the IRC5 data nodes. I see "MonitoredItem.M… --- ## [Smart component OPC UA client with CoDeSys Control Win V3](https://tech-community.robotics.abb.com/t/smart-component-opc-ua-client-with-codesys-control-win-v3/10420)
**Author:** [@MartinB](https://tech-community.robotics.abb.com/u/MartinB)\ **Replies:** 5\ **Last updated:** [October 27, 2021, 6:45am UTC](https://tech-community.robotics.abb.com/t/smart-component-opc-ua-client-with-codesys-control-win-v3/10420 "2021-10-27T06:45:01Z")
Hi, I’m trying to connect RS OPC UA smart component to the OPC UA server established by the CoDeSys SoftPLC. It won’t connect properly when the Secure connection is checked (image to the left). If this option is not che… --- ## [RobotWare 6.12.03 does not come with option 1582-1 OPC UA Server](https://tech-community.robotics.abb.com/t/robotware-6-12-03-does-not-come-with-option-1582-1-opc-ua-server/10379)
**Author:** [@marcellacavalcanti](https://tech-community.robotics.abb.com/u/marcellacavalcanti)\ **Replies:** 1\ **Last updated:** [September 29, 2021, 8:16am UTC](https://tech-community.robotics.abb.com/t/robotware-6-12-03-does-not-come-with-option-1582-1-opc-ua-server/10379 "2021-09-29T08:16:35Z")
The most recent version of RobotWare 6 does not come with the communication option “1582-1 OPC UA Server”, instead it shows “1582-1 IoT Data Gateway”. This new one allows the IRC5 OPC UA Server Application to connect wit… --- ## [IRC5 OPC UA Server Port](https://tech-community.robotics.abb.com/t/irc5-opc-ua-server-port/10191)
**Author:** [@juansilva](https://tech-community.robotics.abb.com/u/juansilva)\ **Replies:** 1\ **Last updated:** [May 19, 2021, 7:08pm UTC](https://tech-community.robotics.abb.com/t/irc5-opc-ua-server-port/10191 "2021-05-19T19:08:49Z")
Over which protocol/port does OPC UA Server communicate with the IRC5 controllers?