rackio-opc-ua

A Rackio extension to add a OPC-UA support to a Rackio application

Installation

pip install RackioOPC-UA

Usage

from rackio import Rackio
from rackio_opcua import RackioOPCUA

app = Rackio()

driver = RackioOPCUA(app, port=4840)

app.run(8028)

Creating Tree Nodes

In order to create nodes, you can define custom folders, devices and mappings.

folder = driver.define_folder("default")

device = folder.define_device("main")

Mappings allows to bind a OPC-UA object node to a Rackio defined Tag.

device.define_mapping("T1", "write")
device.define_mapping("T3", "read")

write mode allows to read and write from a OPC-UA Client, and read mode allows to read only. By default, the binding timing period is 0.25 seconds. You bypass this by providing the period parameter, in seconds.

device.define_mapping("T1", "read", period=0.5)

You can also define mappings inside folders and can define folders inside folders.

Server address

Once the OPC-UA server is up and running, you can browse its tre with a OPC-UA Cliente in the following addres:

opc.tcp://0.0.0.0:4840/rackio/server

You can override the server port and server name as following.

driver = RackioOPCUA(app, name="sensor", port=4545)

Which will have the following address:

opc.tcp://0.0.0.0:4545/sensor/server

Features to develop

Some OPC-UA features are in development phase suchas.

• Custom Method definitions
• Custom Data Types definitions
• History Query
• Loading configurations form a file (JSON and XML)