Read-and-write property specifying the security mode used when connecting to an OPC UA server. This property cannot be changed while communication is active. Possible values for this property are the following:
•1 - usmNone: Does not use any security mode in the connection (default)
•2 - usmSign: Uses authentication in the connection
•3 - usmSignAndEncrypt: Uses authentication and encryption in the connection
This property is used together with the SecurityPolicy property to determine the type of security of the connection.
NOTE |
If the SecurityMode property is different from usmNone, the OPC UA server must accept the certificate from E3 client's instance. The way a certificate is accepted or recognized by an OPC UA server depends on the server. |