python (65.1k questions)

javascript (44.2k questions)

reactjs (22.7k questions)

java (20.8k questions)

c# (17.4k questions)

html (16.3k questions)

r (13.7k questions)

android (12.9k questions)

Questions - opc

Python OPC UA call method without arguments gives error

I am trying to call a method with no input arguements which is as follows : [1] [1]: https://i.stack.imgur.com/tGFe9.png So far I have tried this : method=client.get_node("ns=5;s=Demo.StateMachi...
test-img

Akhilesh patti

python

methods

opc-ua

opc

Votes: 0

Answers: 1

Latest Answer

The server is telling you this method cannot be executed. There doesn't appear to be anything wrong with your client, check the server configuration.
test-img

Kevin Herron

What is the best practice for reading items from OPC DA v1 server

I have a need to connect to an older OPC DA server which is v1 I believe, there are credentials setup to allow access to the server to read groups/items. However, the issue I am facing is that after t...
test-img

Aidan Donnelly

python

node.js

opc

opc-da

Votes: 0

Answers: 1

Latest Answer

There is an extension to OPC DA called the OPC Security 1.0 specification. I have never seen it implemented though. OPC Security 1.0 Spec In Matrikon OPC Explorer v5, when you click on an OPC server, ...
test-img

bruceceng

OPC UA client: Call Methods

I'm Trying to call a method from a OPC UA server device. this is the method: StartScan Method It contains Two Arguments: InputArguments OutputArguments I'm not able with my code: from opcua import Cli...
test-img

Leonardo Tavolari

python

opc-ua

opc

Votes: 0

Answers: 1

Latest Answer

You have to get the parent object and use call_method from it. The first parameter is then your method. This should work. method = client.get_node("ns=3; i=7009") parent_obj = "ns=3; i=...
test-img

Schroeder

UaException: status=Bad_SessionClosed, message=The session was closed by the client

Something happened when I used Milo,I do not know why it happened: UaException: status=Bad_SessionClosed, message=The session was closed by the client. at org.eclipse.milo.opcua.sdk.client.session...
test-img

无人岛旅行

java

opc-ua

opc

milo

Votes: 0

Answers: 1

Latest Answer

It looks like you’re trying to get the Session but nothing has called SessionFsm::openSession. You’ll have to share some code, because this is normally done by the SDK if you are using OpcUaClient. Di...
test-img

Kevin Herron

Posts

Questions

Blogs

Jobs