vnx.opc_ua.Server¶

Module¶

The vnx.opc_ua.Server module provides a OPC-UA server to interface with the running process.

Depending on the configuration different modules and topics are offered on the OPC-UA interface.

Options¶

string custom_hostname¶: An optional custom host name.

uint port = 4840¶: The port number the server binds to.

set<string> export_services¶: List of modues to offer on the OPC-UA interface as objects.

set<string> export_topics¶: List of topics to offer on the OPC-UA interface as variables.

string certificate_file¶: Optional path to a server certificate file (DER format).

string private_key_file¶: Optional path to a server private key file (DER format).

string application_name = "pilot.opc_ua.server"¶: Optional application name.

string application_uri = "urn:open62541.server.application"¶: Must match the URI in the certificate.

vector<string> trust_list¶: Client certificate trust files (CRL format). This only has an effect if a server certificate is configured. If the list is empty, any certificate is accepted.

bool add_insecure_discovery = true¶: Allow discovery with security policy NONE even if not configured. This is necessary if you want a secure server (i.e. no NONE policy) that can still be discovered by a client. If security policy NONE is configured, this option has no effect.

vector<security_policy_e> security_policies¶: A list of the security/encryption policies to provide. Most policies require a certificate and a private key. See vnx.opc_ua.security_policy_e

vector<pair<node_id_t, Variant>> variables¶: A list of writable variables to create. For each variable a vnx.opc_ua.node_id_t and an initial value is expected. The type of the variable is guessed from the initial value.

map<string, node_id_t> error_variables¶: Create optional error variables for exported services where error messages from their method calls are published. This can be necessary, since OPC-UA does not support returning error messages.

bool use_authentication¶: If to require authentication from clients. If set to false, any connected user has full permissions.

bool allow_anonymous_access¶: Allow access without authentication.

string default_access¶: Default access level for anonymous clients, see User Management. This only has an effect if use_authentication is set to true.