OPC UA Connector
Learn how to connect to an OPC UA server using the Heisenware OPC UA integration.
Depending on your setup, you may first need to create an OPC UA Client Agent to connect to a local OPC UA Server. For the default cloud-based setup, it is needed. If you are self-hosting Heisenware and OPC UA server as well as your Heisenware instance are running in the same network, you may skip this step.
Video tutorial
Watch the video to learn how to connect to an OPC UA Server and read, record and visualize OPC UA data from that server within Heisenware.
Creating an OPC UA instance
The create function constructs an OPC UA client instance. Creating an instance is necessary to connect to an OPC UA server. If you are using an agent, this must be done inside the agent.
securityMode
'None'
One from 'unauthorized', 'None', 'Sign' or 'SignAndEncrypt'.
securityPolicy
'None'
One from 'Aes128_Sha256_RsaOaep', 'Basic128', 'Basic192', 'Basic192Rsa15', 'Basic256Sha256', 'Basic256Rsa15', 'Basic256Rsa15', 'unauthorized', 'None', 'PubSub_Aes128_CTR' or 'PubSub_Aes256_CTR'.
certificateFile
String
privateKeyFile
String
OPC UA functions
connect
Connects to an OPC UA server. Enter the endpointUrl into the first input box and optionally more parameters into the second input box.
endpointUrl
String
username
String
password
String
userCertificate
String
userCertificate
PrivateKey
String
This example shows how to configure the connect function if you are using an OPC UA server with username and password.
isConnected
Checks if the client is connected to the server.
disconnect
Disconnects from the server.
browseObjects
Detailed browsing of the OPC UA objects given a path (non-recursive).
browseTypes
Detailed browsing of OPC UA Types given a path (non-recursive).
browseViews
Detailed browsing of OPC UA Views given a path (non-recursive).
browse
Generic browsing of the OPC UA server (non-recursive).
You can use the parameter address to navigate to the desired folder. The function shows the contents of the root folder as default. You can also specify the session with sessionId.
listenToEvents
Reports about relevant events. You can use the listener box to connect a function to run on events.
readNode
Reads a variable.
Use parameter address for the node ID or a valid browse path. You can also specify the session with sessionId.
readVariable
Reads the value of a variable.
Use parameter address for the node ID or a valid browse path.
monitorNode
Starts monitoring an item.
address
String
Node ID or a valid browse path.
listener
Function
The connected function is automatically called upon time change.
samplingInterval
Integer
1000
The sampling interval in milliseconds.
queueSize
Integer
100
The maximum queue size.
discardOldest
Boolean
true
Sets the policy for when the queue is full. Decides whether to discard the oldest or newest entries. Default discards the oldest entries.
subscriptionId
String
monitorValue
Starts monitoring an item value.
address
String
Node ID or a valid browse path.
listener
Function
The connected function is automatically called upon time change.
samplingInterval
Integer
1000
The sampling interval in milliseconds.
queueSize
Integer
100
The maximum queue size.
discardOldest
Boolean
true
Sets the policy for when the queue is full. Decides whether to discard the oldest or newest entries. Default discards the oldest entries.
subscriptionId
String
stopMonitor
Stops monitoring an item. Use the parameter nodeId to specify what to stop monitoring.
writeVariable
Sets a variable's value. Input the nodeId or browse path in the address input box, and the new variable value in the value box.
callMethod
Calls an OPC UA method using inferred data types from the server's method metadata.
browseDirectory
Browses a file directory.
readFile
Reads a file made available through the remote OPC UA server.
writeFile
Creates a new file on the server in the specified folder and uploads local content to it.
Last updated