Main |
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Name | A name used to identify this connection. |
Description | Short description of this connection. |
Enabled | Disable the connection to the OPC server. |
Read-only | Puts the connection into read-only mode. All writes sent to this server will fail. |
Authentication |
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Username | A username the connection will use when authenticating with the UA server. |
Password Fields | The password to use when authenticating with the UA server. |
Advanced |
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Host Override | When specified, if the endpoint address returned by the OPC server has a different IP address or hostname than the discovered endpoint, the overridden value will be used. Expects just an IP address or hostname, for example: 192.168.1.10 |
Connect Timeout | The timeout, in milliseconds, when opening a socket connection to a remote host. Default is 5,000. |
Acknowledge Timeout | The timeout, in milliseconds, to wait for an Acknowledge message in response to the client's Hello message. Default is 5,000. |
Request Timeout | Maximum amount of time, in milliseconds, to wait for the response to a request. Default is 120,000. |
Session Timeout | Requested session timeout value, in milliseconds. Default is 120,000. |
Max Per Operation | Specify the maximum number of nodes to read, write, subscribe, or unsubscribe to in any given UA server request. Default is 8,192. |
Max References Per Node | Configures the number of references per node. A "node" in this case is any item inside of a UA server, so items like tags and folders would qualify as a node, while a References is simply a reference to another node. This setting is useful in situations where the address space is completely flat, so a large number of adjacent nodes could potentially run into a maximum message size. In these cases increasing the value of this property can be useful. However, most systems will not need to change this setting. Defaults to 8,192 references. |
Max Pending Publish Requests | The number of concurrent Publish Requests allowed to be pending at any given time. Default is 2. |
Max Notifications Per Publish | The maximum number of notifications per publish. Default is 65,535. |
Max Message Size | The maximum allowable size of an OPC UA application layer message. Default is 33,554,432. |
Max Array Length | The maximum allowable size for arrays. Default is 2,147,483,647. |
Max String Length | The maximum allowable size for strings. Default is 2,147,483,647. |
Type Dictionary Fragment Size | The fragment size to request when reading the server's type dictionary. Default is 8,192. |
Keep-Alive Failures Allowed | Number of consecutive failures allowed before disconnecting. Setting this to <= 0 means consecutive failures will not cause a disconnect. Default is 1. |
Keep-Alive Interval | Interval, in milliseconds, between keep-alive requests. |
Keep-Alive Timeout | Max duration, in milliseconds, to wait for a response to a keep-alive request. Default is 10,000. |
Browser Origin | The Node that browsing should originate from. Options are OBJECTS_FOLDER or ROOT_FOLDER. Most OPC UA Servers use OBJECTS_FOLDER, but some non-standard servers may require ROOT_FOLDER to browse correctly. Ignition's OPC UA Servers uses OBJECTS_FOLDER. |
Failover |
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Failover Enabled | Enable failover on the connection, allowing the UA client to switch to a backup server in the event the primary server is unavailable. |
Failover Threshold | The number of retry attempts before the failover connection is used. The default is 3. |
Failover Discovery URL | The discovery URL for the backup server's OPC UA server. Expects the following format: |
Failover Endpoint URL | The endpoint of the failover server. Example:
opc.tcp://192.168.1.0:62541
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Failover Host Override | When specified, if the endpoint address returned by the failover OPC server has a different IP address or hostname than the discovered endpoint, the overridden value will be used. Expects just an IP address or hostname. Example: 192.168.1.10 |
KeyStore |
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KeyStore Alias | The alias of the certificate and private key stored in the client KeyStore. |
Password Fields | The password to use when authenticating with the UA server. |