# OPC Expert

> True Vendor Neutrality


## Pages

- [Archive - Run as a Windows Service](https://opcexpert.com/support/archive-run-as-a-windows-service/)
- [Excel - Archive data in CSV files for Excel](https://opcexpert.com/support/excel-archive-data-in-csv-files-for-excel/)
- [Archive values regardless of change](https://opcexpert.com/support/archive-values-regardless-of-change/)
- [OPC Dictionary: Terms, Acronyms & Definitions](https://opcexpert.com/opc-dictionary/)
- [Simplify Data Archiving Questions](https://opcexpert.com/simplify-data-archiving-questions/)
- [Simplify Data Archiving in OPC Systems Questions](https://opcexpert.com/simplify-data-archiving-in-opc-systems-questions/)
- [OPC to Excel real-time data integration questions](https://opcexpert.com/opc-to-excel-real-time-data-integration-questions/)
- [OPC Tunneling with OPC Expert Questions](https://opcexpert.com/opc-tunneling-with-opc-expert/)
- [Bridge OPC DA and OPC UA in Industrial Networks Questions](https://opcexpert.com/bridge-opc-da-and-opc-ua-without-middleware-in-complex-industrial-networks/)
- [OPC Server Redundancy: Strategies for Reliable Data Access Questions](https://opcexpert.com/opc-server-redundancy-strategies-for-reliable-data-access/)
- [Mastering OPC Data Analysis Questions](https://opcexpert.com/mastering-opc-data-analysis-webinar/)
- [OPC Connection Best Practices Questions](https://opcexpert.com/opc-connection-best-practices-webinar/)
- [OPC Webcasts](https://opcexpert.com/opc-webcasts/)
- [OPC to Excel](https://opcexpert.com/opc-to-excel/)
- [OPC Expert Web Server API Documentation](https://opcexpert.com/opc-expert-web-server-api-documentation/)
- [OPC Expert Web Server](https://opcexpert.com/web-server)
- [Activate OPC Expert for free](https://opcexpert.com/support/activate-opc-expert-for-free/)
- [Activating OPC Expert - Dynamic License](https://opcexpert.com/opc-expert-activation-enter-dynamic-license)
- [Run OPC Expert without administrator privilege](https://opcexpert.com/support/run-opc-expert-without-administrator-privilege/)
- [Activating OPC Expert - Static License](https://opcexpert.com/support/activating-opc-expert-static-license)
- [OPC UA Local Discovery Server fails after renaming computer](https://opcexpert.com/support/ua-local-discovery-server/)
- [Store and Forward](https://opcexpert.com/support/store-and-forward/)
- [Excel - Reading Arrays 2-dimension](https://opcexpert.com/support/excel-read-array-2-dimension/)
- [Excel - Reading Arrays 1-dimension](https://opcexpert.com/support/excel-read-array-1-dimension/)
- [Excel and historical OPC data](https://opcexpert.com/support/excel-historical-opc-data/)
- [Tunnel setup](https://opcexpert.com/support/opc-tunnel-setup/)
- [OPC Expert converts OPC clients](https://opcexpert.com/support/opc-expert-converts-opc-clients/)
- [OPC Expert converts OPC servers](https://opcexpert.com/support/opc-expert-converts-opc-servers/)
- [Write data manually](https://opcexpert.com/support/write-data-manually/)
- [Excel - Troubleshoot setup](https://opcexpert.com/support/excel-troubleshoot-setup/)
- [Browsing for data sources](https://opcexpert.com/support/browsing-for-data-sources/)
- [Ping Port](https://opcexpert.com/ping-port/)
- [Bulk data export and import with Excel](https://opcexpert.com/support/bulk-data-export-and-import/)
- [DCOM Authentication Level](https://opcexpert.com/dcom-authentication-level/)
- [Deep Browse](https://opcexpert.com/support/deep-browse/)
- [OPC Expert License Proxy](https://opcexpert.com/support/license-proxy/)
- [Unified Address Space](https://opcexpert.com/unified-address-space/)
- [Modbus Server (Modbus Slave) Configuration](https://opcexpert.com/modbus-server-modbus-slave/)
- [How to Receive Temporary OPC Expert Activation](https://opcexpert.com/support/how-to-receive-temporary-opc-expert-activation)
- [Archive OPC data in SQLite](https://opcexpert.com/sqlite/)
- [Exporting items without subscribing](https://opcexpert.com/support/exporting-items-without-subscribing)
- [Annual Support and Software Maintenance Agreement](https://opcexpert.com/annual-support-maintenance)
- [Archive OPC Data in SQL](https://opcexpert.com/archive-data-in-sql)
- [IoT using OPC and MQTT with SparkplugB](https://opcexpert.com/archive-opc-data-in-mqtt)
- [Archive OPC Data in CSV](https://opcexpert.com/archive-data-csv)
- [OPC Expert with Python](https://opcexpert.com/python)
- [REST API Server](https://opcexpert.com/rest-api/)
- [OPC Security Gateway](https://opcexpert.com/opc-security-gateway/)
- [Troubleshooting OPC and DCOM](https://opcexpert.com/troubleshooting-opc-and-dcom/)
- [Trigger OPC Events](https://opcexpert.com/trigger-opc-events/)
- [Monitor OPC Data](https://opcexpert.com/monitor-opc-data/)
- [OPC Calculator](https://opcexpert.com/opc-calculator/)
- [Network Monitoring](https://opcexpert.com/network-monitoring/)
- [OPC Tunneler](https://opcexpert.com/opc-tunneler/)
- [OPC Redundancy](https://opcexpert.com/opc-redundancy/)
- [Trend OPC Data](https://opcexpert.com/opc-trending/)
- [OPC Blogs](https://opcexpert.com/opc-blogs/)
- [OPC Bridge](https://opcexpert.com/opc-bridge/)
- [OPC Podcasts](https://opcexpert.com/opc-podcasts/)
- [OPC Viewer](https://opcexpert.com/opc-viewer/)
- [OPC FAQs](https://opcexpert.com/opc-faqs/)
- [Polling versus Subscription](https://opcexpert.com/polling-versus-subscription)
- [How To Configure Access Control List](https://opcexpert.com/support/how-to-configure-access-control-list/)
- [Archive Batch Data (event-based archiving)](https://opcexpert.com/archive-batch-data)
- [OPC Expert with Python old](https://opcexpert.com/python-old)
- [License Options](https://opcexpert.com/license-options)
- [Removing OPC Expert files and folders](https://opcexpert.com/support/removing-opc-expert-files-and-folders/)
- [OPC Expert REST API old](https://opcexpert.com/rest-api-old/)
- [Connecting to B&R Industrial Automation](https://opcexpert.com/support/br-industrial-automation/)
- [REST API (Python): Vigier Ciment](https://opcexpert.com/case-studies/rest-api-python-ciments-vigier)
- [Case Study: Convert OPC UA to DA: PT Sanusa Teknologi Utama](https://opcexpert.com/case-studies/opc-da-to-ua-converter-sanusa/)
- [OPC Security Gateway old](https://opcexpert.com/home/opc-expert-security-gateway-old/)
- [DeltaV OPC DA to Ignition UA: Land O'Lakes](https://opcexpert.com/case-studies/deltav-opc_da_to_ignition_ua/)
- [Case Study: Illes Foods (OPC to SQL)](https://opcexpert.com/case-studies/case-study-illes-foods)
- [Case Study: REC Silicon](https://opcexpert.com/case-studies/case-study-rec-silicon)
- [Archives](https://opcexpert.com/support/archives)
- [0x800702E4 DCOM Error](https://opcexpert.com/support/0x800702e4-dcom-error/)
- [Common OPC UA Error Codes](https://opcexpert.com/support/common-opc-ua-error-codes/)
- [Activate OPC Expert](https://opcexpert.com/activate)
- [Communication preferences](https://opcexpert.com/communication-preferences/)
- [john](https://opcexpert.com/john/)
- [Case Study: International Test Solutions (OPC to Excel)](https://opcexpert.com/case-studies/international-test-solutions)
- [OPC Tunneler](https://opcexpert.com/opc-tunneler-2/)
- [Troubleshoot OPC Expert and Excel Connectivity](https://opcexpert.com/support/troubleshoot-opc-excel/)
- [Download Test](https://opcexpert.com/download-test/)
- [Microsoft KB5004442](https://opcexpert.com/support/microsoft-kb5004442/)
- [Microsoft KB5004442](https://opcexpert.com/support/microsoft-kb5004442-2)
- [IoT using OPC and MQTT with SparkplugB](https://opcexpert.com/mqtt)
- [Archive OPC Data in CSV old](https://opcexpert.com/archive-data-csv-old)
- [Archive OPC Data](https://opcexpert.com/archive-opc-data)
- [Archive OPC Data](https://opcexpert.com/archive-opc-data-revised)
- [What is a Remote Services Agreement?](https://opcexpert.com/remote-services/)
- [Error {28E68F9A-8D75-11D1-8DC3-3C302A000000}](https://opcexpert.com/support/28e68f9a)
- [Case Study: Excel (Real Time and Historical Data) International Test Solutions](https://opcexpert.com/case-studies/excel-realtime-historical)
- [Case Studies](https://opcexpert.com/case-studies-2/)
- [Case Study: University West](https://opcexpert.com/case-studies/university-west)
- [Frequently Asked Questions](https://opcexpert.com/faqs/)
- [Simulate a PLC using OPC and Excel](https://opcexpert.com/support/simulate-plc-using-opc/)
- [Case Study: Berry Global](https://opcexpert.com/case-studies/case-study-berry-global/)
- [Create Historical Data Reports](https://opcexpert.com/create-historical-data-reports/)
- [OPC Server Configuration](https://opcexpert.com/opc-server-configuration/)


## Posts

- [Understanding OPC UA Alarms and Conditions (A&C) in Practice Webcast](https://opcexpert.com/webcasts/understanding-opc-ua-alarms-and-conditions-ac-in-practice-webcast/)
- [OPC Standards Bodies & Governance Glossary](https://opcexpert.com/opc-dictionary/opc-standards-bodies-governance-glossary/)
- [OPC Performance & Data Quality Glossary](https://opcexpert.com/opc-dictionary/opc-performance-data-quality-glossary/)
- [Industrial Protocols Compared to OPC UA](https://opcexpert.com/opc-dictionary/industrial-protocols-compared-to-opc-ua/)
- [OPC Legacy & Underlying Technology Glossary](https://opcexpert.com/opc-dictionary/opc-legacy-underlying-technology-glossary/)
- [OPC Integration & IT/OT Systems Glossary](https://opcexpert.com/opc-dictionary/opc-integration-it-ot-systems-glossary/)
- [OPC UA Security Terms & Glossary](https://opcexpert.com/opc-dictionary/opc-ua-security-terms-glossary/)
- [OPC UA Communication & Session Glossary](https://opcexpert.com/opc-dictionary/opc-ua-communication-session-terms/)
- [OPC UA Architecture & Data Modeling Glossary](https://opcexpert.com/opc-dictionary/opc-ua-architecture-data-modeling-glossary/)
- [OPC Fundamentals & Standards Glossary](https://opcexpert.com/opc-dictionary/opc-fundamentals-standards/)
- [Trend OPC Data in Real Time and Back in Time with OPC Expert](https://opcexpert.com/blog/trend-opc-data-opc-expert/)
- [OPC Data Archiving to SQL and CSV: Skip the Historian](https://opcexpert.com/blog/opc-data-archiving-sql-csv-historian-alternative/)
- [OPC Data Archiving to SQL and CSV: Skip the Historian](https://opcexpert.com/blog/opc-data-archiving-sql-csv/)
- [OPC Server Redundancy: Hot, Warm & Cold Failover](https://opcexpert.com/blog/opc-server-redundancy-hot-warm-cold-failover/)
- [OPC Data in Excel Without Programming](https://opcexpert.com/blog/opc-data-excel-no-programming/)
- [Best Practices for Securing OPC Installations With OPC Expert](https://opcexpert.com/webcasts/2026-05-28-webinar/best-practices-for-securing-opc-installations-with-opc-expert/)
- [OPC UA Certificate Management: Expiry and Revocation Guide](https://opcexpert.com/webcasts/2026-05-28-webinar/opc-ua-certificate-management-expiry-and-revocation-guide/)
- [OPC Security Gateway: Configuring Granular Access Control](https://opcexpert.com/webcasts/2026-05-28-webinar/opc-security-gateway-configuring-granular-access-control/)
- [How Does an OPC Security Gateway Work and When Should You Use One](https://opcexpert.com/webcasts/2026-05-28-webinar/how-does-an-opc-security-gateway-work-and-when-should-you-use-one/)
- [Adding OPC UA Security to an Existing Legacy OPC DA System](https://opcexpert.com/webcasts/2026-05-28-webinar/adding-opc-ua-security-to-an-existing-legacy-opc-da-system/)
- [Securing OPC UA Connections With Certificates and User Auth](https://opcexpert.com/webcasts/2026-05-28-webinar/securing-opc-ua-connections-with-certificates-and-user-auth/)
- [Where to Place Your OPC Security Gateway in the Network](https://opcexpert.com/webcasts/2026-05-28-webinar/where-to-place-your-opc-security-gateway-in-the-network/)
- [Securing OPC Read, and Write Access Using OPC Security Gateway](https://opcexpert.com/webcasts/securing-opc-read-and-write-access-using-opc-security-gateway-2/)
- [OPC Data in Excel Without Programming](https://opcexpert.com/blog/real-time-opc-data-into-excel-without-programming/)
- [OPC DA vs OPC UA: Differences and Migration Guide](https://opcexpert.com/blog/opc-da-vs-opc-ua-differences-and-migration-guide/)
- [Why OPC Connections Fail: DCOM, Firewalls, and Authentication](https://opcexpert.com/blog/why-opc-connections-fail-across-domains/)
- [How to Check OPC UA Certificate Expiration and Get Expiry Alerts](https://opcexpert.com/webcasts/2025-11-13-webinar/opc-ua-certificate-expiration-check-alerts/)
- [How to Integrate OPC UA Data with Ignition SCADA and SQL](https://opcexpert.com/webcasts/2025-11-13-webinar/how-to-integrate-opc-ua-data-with-ignition-scada-and-sql/)
- [How to Create Custom Reports and Dashboards for OPC Alarms and Events](https://opcexpert.com/webcasts/2025-11-13-webinar/how-to-create-custom-reports-and-dashboards-for-opc-alarms-and-events/)
- [OPC Data Performance: Update Rates and Tag Volume Considerations](https://opcexpert.com/webcasts/2025-11-13-webinar/opc-data-performance-update-rates-and-tag-volume-considerations/)
- [Archiving OPC Data to SQL and CSV Without Admin Privileges](https://opcexpert.com/webcasts/2025-11-13-webinar/archiving-opc-data-to-sql-and-csv-without-admin-privileges/)
- [OPC Architecture: Firewalls, Dashboards, and Connector Options](https://opcexpert.com/webcasts/2025-11-13-webinar/opc-architecture-firewall-dashboard-connectors/)
- [How to Simplify OPC Data Archiving Without a Historian](https://opcexpert.com/webcasts/2025-11-13-webinar/how-to-simplify-opc-data-archiving-without-a-historian/)
- [How to Read Euromap Data into an ERP via OPC Archiving](https://opcexpert.com/webcasts/2025-11-13-webinar/how-to-read-euromap-data-into-an-erp-via-opc-archiving/)
- [How to Set Up a Running OPC Data Trend for Recent Data During Events](https://opcexpert.com/webcasts/2025-11-13-webinar/opc-running-trend-recent-data-event/)
- [How to Centralize and Visualize OPC Data Across an Entire Company](https://opcexpert.com/webcasts/2025-11-13-webinar/centralize-visualize-opc-data-company-wide/)
- [How to Send OPC UA Data to Azure or Google Cloud](https://opcexpert.com/webcasts/2025-11-13-webinar/opc-ua-data-to-azure-cloud/)
- [How to Log PLC Process Data to a CSV File Using OPC](https://opcexpert.com/webcasts/2025-11-13-webinar/how-to-log-plc-process-data-to-a-csv-file-using-opc/)
- [Storing and Accessing OPC UA Historical Data in SQL](https://opcexpert.com/webcasts/2025-11-13-webinar/storing-and-accessing-opc-ua-historical-data-in-sql/)
- [How to Transfer OPC Alarms and Events Data to a SQL Database](https://opcexpert.com/webcasts/2025-11-13-webinar/opc-alarms-events-to-sql-database/)
- [Historian vs. OPC Data Archive: Pros, Cons, and When to Use Each](https://opcexpert.com/webcasts/2025-11-13-webinar/historian-vs-opc-data-archive-pros-cons-and-when-to-use-each/)
- [How to Capture Real-Time OPC DA and UA Data for Archiving](https://opcexpert.com/webcasts/2025-11-13-webinar/how-to-capture-real-time-opc-da-and-ua-data-for-archiving/)
- [OPC Data Archiving with OPC Expert](https://opcexpert.com/webcasts/opc-data-archiving-with-opc-expert/)
- [Setting OPC Connections to Read-Only to Prevent Writes](https://opcexpert.com/webcasts/2025-10-2-webinar/setting-opc-connections-to-read-only-to-prevent-writes/)
- [Send Email Alerts When an OPC Value Drops Below a Threshold](https://opcexpert.com/webcasts/2025-10-2-webinar/send-email-alerts-when-an-opc-value-drops-below-a-threshold/)
- [Saving OPC Excel Configuration Across File Close and Reopen](https://opcexpert.com/webcasts/2025-10-2-webinar/saving-opc-excel-configuration-across-file-close-and-reopen/)
- [Real-Time vs. Historical OPC Data in Excel: Key Differences](https://opcexpert.com/webcasts/2025-10-2-webinar/real-time-vs-historical-opc-data-in-excel-key-differences/)
- [How to Retrieve OPC Variable Engineering Units in Excel](https://opcexpert.com/webcasts/2025-10-2-webinar/opc-variable-engineering-units-excel/)
- [Does OPC Expert Need to Be on the Same PC as the OPC Server?](https://opcexpert.com/webcasts/2025-10-2-webinar/does-opc-expert-need-to-be-on-the-same-pc-as-the-opc-server/)
- [OPC UA Security Features: Encryption and Authentication](https://opcexpert.com/webcasts/2025-10-2-webinar/opc-ua-security-features-encryption-authentication/)
- [OPC Data Archiving: Performance, Volume, and Compression](https://opcexpert.com/webcasts/2025-10-2-webinar/opc-data-archiving-performance-volume-and-compression/)
- [OPC Redundancy: Automatic Failover to a Backup Server](https://opcexpert.com/webcasts/2025-10-2-webinar/opc-redundancy-automatic-failover-to-a-backup-server/)
- [Running an OPC DA Client Inside a Virtual Machine](https://opcexpert.com/webcasts/2025-10-2-webinar/running-an-opc-da-client-inside-a-virtual-machine/)
- [OPC to Excel real-time data integration](https://opcexpert.com/webcasts/access-and-analyze-opc-data-in-microsoft-excel-2/)
- [Certificate Exchange for OPC UA Connections in OPC Expert](https://opcexpert.com/webcasts/2025-09-13-webinar/certificate-exchange-for-opc-ua-connections-in-opc-expert/)
- [Using OPC Expert in Redundant and High Availability Architectures](https://opcexpert.com/webcasts/2025-09-13-webinar/using-opc-expert-in-redundant-and-high-availability-architectures/)
- [Do DCOM Settings Need to Be Configured on Both OPC Machines?](https://opcexpert.com/webcasts/2025-09-13-webinar/dcom-settings-both-opc-client-server-machines/)
- [Setting Up a Stable Pure DCOM Connection Between 32-Bit and 64-Bit Windows](https://opcexpert.com/webcasts/2025-09-13-webinar/setting-up-a-stable-pure-dcom-connection-between-32-bit-and-64-bit-windows/)
- [Is Firewall Port Reduction the Main Reason to Use an OPC DA/UA Tunneller?](https://opcexpert.com/webcasts/2025-09-13-webinar/is-firewall-port-reduction-the-main-reason-to-use-an-opc-da-ua-tunneller/)
- [How the OPC Expert Normalizer Function Works](https://opcexpert.com/webcasts/2025-09-13-webinar/opc-expert-normalizer-function-explained/)
- [Does OPC Expert Add Network Traffic on the Source Device?](https://opcexpert.com/webcasts/2025-09-13-webinar/does-opc-expert-add-network-traffic-on-the-source-device/)
- [OPC Tunneling with OPC Expert](https://opcexpert.com/webcasts/opc-tunneling-with-opc-expert/)
- [How Many OPC UA Data Points Per Thread Prevent Data Freezing?](https://opcexpert.com/webcasts/2025-08-7-webinar/how-many-opc-ua-data-points-per-thread-prevent-data-freezing/)
- [Configuring OPC Redundancy Without a Server Heartbeat Signal](https://opcexpert.com/webcasts/2025-08-7-webinar/configuring-opc-redundancy-without-a-server-heartbeat-signal/)
- [Does OPC Expert Need to Be Installed on Both Machines?](https://opcexpert.com/webcasts/2025-08-7-webinar/does-opc-expert-need-to-be-installed-on-both-machines/)
- [How to Permanently Fix Recurring Data Freezing Issues in OPC](https://opcexpert.com/webcasts/2025-08-7-webinar/fix-recurring-opc-data-freezing-issues/)
- [Is OPC Expert Compatible with OPC Servers from Multiple Vendors?](https://opcexpert.com/webcasts/2025-08-7-webinar/is-opc-expert-compatible-with-opc-servers-from-multiple-vendors/)
- [Using OPC Bridge Between a PLC and SCADA Platforms Like Wonderware](https://opcexpert.com/webcasts/2025-08-7-webinar/using-opc-bridge-between-a-plc-and-scada-platforms-like-wonderware/)
- [Does OPC Bridge Support Hot Standby Redundancy Configuration?](https://opcexpert.com/webcasts/2025-08-7-webinar/does-opc-bridge-support-hot-standby-redundancy-configuration/)
- [OPC Bridge vs. OPC Tunnel: Which to Use for OPC DA to OPC UA](https://opcexpert.com/webcasts/2025-08-7-webinar/opc-bridge-vs-opc-tunnel-which-to-use-for-opc-da-to-opc-ua/)
- [Where Does OPC Expert Run When Connecting OPC UA to OPC DA?](https://opcexpert.com/webcasts/2025-08-7-webinar/where-does-opc-expert-run-when-connecting-opc-ua-to-opc-da/)
- [Security Considerations When Bridging Remote OPC Servers](https://opcexpert.com/webcasts/2025-08-7-webinar/security-considerations-when-bridging-remote-opc-servers/)
- [Log OPC DA Data Directly to Excel Without Manual Conversion](https://opcexpert.com/webcasts/2025-08-7-webinar/log-opc-da-data-directly-to-excel-without-manual-conversion-1/)
- [Can OPC Bridge Connect Two OPC Clients Instead of Servers?](https://opcexpert.com/webcasts/2025-08-7-webinar/can-opc-bridge-connect-two-opc-clients-instead-of-servers/)
- [OPC Expert Licensing: Servers, Instances, and Bridge Features](https://opcexpert.com/webcasts/2025-08-7-webinar/opc-expert-licensing-servers-instances-and-bridge-features/)
- [Bridge OPC DA and OPC UA in Industrial Networks](https://opcexpert.com/webcasts/bridge-opc-da-and-opc-ua-in-industrial-networks/)
- [Is a Trial or Demo Version of OPC Expert Available](https://opcexpert.com/webcasts/2025-07-10-webinar/is-a-trial-or-demo-version-of-opc-expert-available/)
- [Is OPC Expert Compatible with OPC Servers from Any Manufacturer?](https://opcexpert.com/webcasts/2025-07-10-webinar/is-opc-expert-compatible-with-opc-servers-from-any-manufacturer/)
- [OPC Server as a Windows Service vs. OPCEnum: Key Differences Explained](https://opcexpert.com/webcasts/2025-07-10-webinar/opc-server-as-a-windows-service-vs-opcenum-key-differences-explained/)
- [Running a Classic OPC DA Server as a Windows Service Using OPC Expert](https://opcexpert.com/webcasts/2025-07-10-webinar/running-a-classic-opc-da-server-as-a-windows-service-using-opc-expert/)
- [Is OPC Expert an OPC Server, an OPC Client, or Middleware?](https://opcexpert.com/webcasts/2025-07-10-webinar/is-opc-expert-an-opc-server-an-opc-client-or-middleware/)
- [Troubleshooting OPC DA Connection Failures on Dual-Ethernet DCS Systems](https://opcexpert.com/webcasts/2025-07-10-webinar/troubleshooting-opc-da-connection-failures-on-dual-ethernet-dcs-systems/)
- [Warm and Cold OPC Redundancy: Handling Writes During Inactive Standby](https://opcexpert.com/webcasts/2025-07-10-webinar/warm-and-cold-opc-redundancy-handling-writes-during-inactive-standby/)
- [Does OPC Expert Need to Be Installed on Primary and Secondary Servers?](https://opcexpert.com/webcasts/2025-07-10-webinar/does-opc-expert-need-to-be-installed-on-primary-and-secondary-servers/)
- [How OPC Expert Detects OPC Server Failures and Initiates Failover](https://opcexpert.com/webcasts/2025-07-10-webinar/how-opc-expert-detects-opc-server-failures-and-initiates-failover/)
- [OPC Expert Redundancy: How Hot, Warm, and Cold Modes Differ](https://opcexpert.com/webcasts/2025-07-10-webinar/opc-expert-redundancy-how-hot-warm-and-cold-modes-differ/)
- [OPC Server Redundancy: Strategies for Reliable Data Access](https://opcexpert.com/webcasts/opc-server-redundancy-strategies-for-reliable-data-access-2/)
- [Can You Set a Different Recording Interval Per Tag in OPC Expert?](https://opcexpert.com/webcasts/2025-06-12-webinar/can-you-set-a-different-recording-interval-per-tag-in-opc-expert/)
- [Sequential OPC Data Acquisition Without Excessive Storage](https://opcexpert.com/webcasts/2025-06-12-webinar/sequential-opc-data-acquisition-without-excessive-storage/)
- [OPC Alarms and Events from a Siemens PLC: State Change Handling](https://opcexpert.com/webcasts/2025-06-12-webinar/opc-alarms-and-events-from-a-siemens-plc-state-change-handling/)
- [Can OPC Data Archiving Be Triggered by External Conditions?](https://opcexpert.com/webcasts/2025-06-12-webinar/can-opc-data-archiving-be-triggered-by-external-conditions/)
- [Does OPC Expert's Free Version Time Limit Apply to Archiving?](https://opcexpert.com/webcasts/2025-06-12-webinar/does-opc-experts-free-version-time-limit-apply-to-archiving/)
- [What Operating Systems Does OPC Expert Support?](https://opcexpert.com/webcasts/2025-06-12-webinar/what-operating-systems-does-opc-expert-support/)
- [Configuring OPC Expert Through a Strict Hardware Firewall](https://opcexpert.com/webcasts/2025-04-23-webinar/configuring-opc-expert-through-a-strict-hardware-firewall/)
- [Resolving OPC DA Connection Failures Caused by NAT Filtering](https://opcexpert.com/webcasts/2025-04-23-webinar/resolving-opc-da-connection-failures-caused-by-nat-filtering/)
- [Does OPC Expert Support Mobile Monitoring via a Phone or Tablet?](https://opcexpert.com/webcasts/2025-04-23-webinar/does-opc-expert-support-mobile-monitoring-via-a-phone-or-tablet/)
- [Troubleshooting Embedded OPC Servers Without OPCEnum Access](https://opcexpert.com/webcasts/2025-04-23-webinar/troubleshooting-embedded-opc-servers-without-opcenum-access/)
- [Changing OPC Trend Sampling Time During an Active Session](https://opcexpert.com/webcasts/2025-04-23-webinar/changing-opc-trend-sampling-time-during-an-active-session/)
- [Troubleshooting OPC UA Certificate Exchange and Trust Issues](https://opcexpert.com/webcasts/2025-04-23-webinar/troubleshooting-opc-ua-certificate-exchange-and-trust-issues/)
- [Sending Data and Commands from OPC Client to OPC Server](https://opcexpert.com/webcasts/2025-04-23-webinar/sending-data-and-commands-from-opc-client-to-opc-server/)
- [Capturing OPC Client and Server Communication Traffic Logs](https://opcexpert.com/webcasts/2025-04-23-webinar/capture-opc-communication-traffic-log-connections/)