OPC UA Server settings

An OPC UA server connection can be used simultaneously by as many partners as specified under Number of instances.

Additional connection parameters

Some OPC-UA servers need additional connection parameters. If not leave the field empty. The documentation of the device provides the required information.

Security and Login

OPC-UA allows lot of options for security. All are basing on Certificates. Additional a password may be needed.

Memory limit

Each OPC frame can have a size of up to 4 gigabytes. Usually, frames of that size are not required. Since OPC must provide the memory for such frames, you can restrict this value in order to prevent reduced performance. This value should be selected in a way that it will not cause a frame of maximum length to be truncated.

If at runtime, this limit is exceeded, the data will be discarded and the communication partner will receive a corresponding message.

Other settings

Allow writ with compatible data types

Using OPC UA, writing is only possible with the correct data type. In real plants this behavior is not ideal. This option allows the server to convert the data type to fit .

Return IP address instead of the station name

When connecting, the name of the target device is queried. However, if the name resolution is not configured correctly, a connection to this name will fail. So it is possible to return the IP address instead of the name.

Allow access to user files via OPC UA

OPC-UA allows file functions. If you want to use them, turn this option on.