Technical articles for industrial IT and OT teams
74 articles on OEE, Modbus, OPC UA and MQTT, OT security, industrial data, edge computing and IT/OT project planning.
7 articles · security
Time synchronization for industrial data: NTP, PTP and timestamp discipline
Why timestamps decide whether data can be trusted, where NTP is enough, when PTP is worth the effort, and how to choose a single time source and timestamp convention.
OPC UA security basics: modes, policies and certificate trust
What Sign and SignAndEncrypt actually change, which security policies to avoid, how application certificates and trust lists work, and the connection errors you will meet first.
Build an OT asset inventory without disrupting production
Start with existing evidence, reconcile device ownership and make unknown assets actionable.
A PLC backup is not complete until recovery is tested
Plan a restore drill that checks project files, licenses, hardware dependencies and operational acceptance.
Make vendor remote access a controlled work session
Document the purpose, approved route, time window and closeout evidence for a maintenance connection.
Firmware Update Management for Industrial Devices: Policy Over Panic
Unpatched devices are a risk; botched updates are a production outage. A process for firmware that balances both.
Secure Remote Access for Legacy Industrial Equipment
Patterns for giving vendors, integrators and remote engineers controlled access to PLCs and HMIs without exposing them to the internet: brokered sessions, multifactor authentication, time limits and recording.
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