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| Setting | Purpose |
Reject SHA1 Signed Certificates | Select this option to reject SHA1 signed client certificates and require only SHA256 certificates. Default - not selected. |
Accept Non-Secure Sessions | Select this option to allow client applications to connect a session without using encryption – Security Policy None. Default - not selected. |
Accept Untrusted Certificates | Select this option to accept untrusted certificates from clients. This option should only be enabled for troubleshooting purposes and disabled during production run time. Default - not selected. |
Allow Writes to Items by Anonymous Users | Select this option to allow anonymously connected users to write to items (Nodes) in the address space. Default - not selected. |
Only Connect to asiData When There Are Active Client Sessions | Select this option to cause the OPC UA Server to only connect to the asiData service of ACM when it has an active client session. If asiData service is not running and this option is enabled, the the OPC UA server will start asiData then connect. The Server will disconnect from asiData when all client sessions are deleted. Default - not selected |
Send Complete Certificate Chain | Select this option to allow the Server to send the complete certificate chain during a session connection. Default - not selected. |
Add Application Certificate to Trusted Store | Select this option to automatically copy the AUTOSOL OPC UA server self-signed certificate to the trusted store. Default - not selected. |
Register With Local Discovery Service | Select this option if an OPC UA Local Discovery Service is running and the Server should register with it upon startup. Default - not selected. |
Enable Diagnostics | Select this option to enable the collection of the Server’s diagnostic and throughput data. Default - not selected. |
| Maximum Monitored Items per Call | The maximum number of items that the client can send in one Create Monitored Items request. The client will make multiple calls if the total item count exceeds this value. Default - 1000. |
Minimum Certificate Key Size | The minimum certificate key strength that will be accepted. Default - 1024 |
Session Nonce Length | The length of nonce to use in the CreateSession service. Default – 32 |
Log Option - Errors | Select this option to log error messages to the ACM logger. Default - not selected. |
Log Option - Warning | Select this option to log warning messages to the ACM logger. Default - not selected. |
Log Option - Trace | Select this option to log verbose informational messages to the ACM logger. Default - not selected. |
Log Option – OPC UA Stack | Select this option to log message from underlying OPC UA stack to the ACM logger. Default - not selected. |
Service Port – opc.tcp | TCP port to listen on for client opc.tcp connections. Default - 5337 |
Service Port - https | TCP port to listen on for client https connections. Default - 6337 |
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