Why study the Vendor implementations block for OPC UA?

The Vendor implementations block covers notions that appear repeatedly in the theory and hands-on parts of the OPC UA exam. Mastering these questions significantly cuts the risk of stalling on this topic on exam day.

How many Vendor implementations questions appear in the OPC UA exam?

Varies by session — typically 2 to 4 questions per block in the OPC UA theory exam, plus an applied scenario in the practical part where applicable.

OPC UA · topic block

Vendor implementations OPC UA: exam questions with worked answers

Practice questions from the Vendor implementations block of the OPC UA Knowledge certification. Detailed corrections, public sources, free to read without sign-up.

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Questions for the "Vendor implementations" topic

Q01
Siemens S7-1500 (and S7-1200 V4.5+) PLCs embed a native OPC UA server that can be configured directly from TIA Portal: expose or restrict variables, set Security Mode and Policy, manage certificates, all without any additional hardware.
TrueFalse
11. Vendor implementations· Siemens TIA OPC UA· Medium
Correct answer
True
Learning tip
The TIA Portal workflow for OPC UA on an S7-1500 is straightforward. In CPU properties, the OPC UA section enables the server. The integrator then picks the endpoint Security Mode (None, Sign, SignAndEncrypt), imports or generates the CPU certificates, configures user authentication (Anonymous, Username/Password), and finally maps PLC tags to OPC UA nodes using a UserDefined Type in a custom namespace. After compile and download, a MES such as Inductive Ignition or Siemens WinCC can read PLC values directly through OPC UA, with no custom driver in between.
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Q02
Ignition (Inductive Automation) is a modern SCADA/MES platform built around native OPC UA: it ships one integrated OPC UA Server plus drivers for 60+ protocols (BACnet, Modbus, KNX via gateway, Siemens S7, etc.), a web-based HMI and an MQTT IIoT Pub/Sub engine.
TrueFalse
11. Vendor implementations· Ignition (Inductive Automation)· Medium
Correct answer
True
Learning tip
Ignition is structured around three components. The Gateway is a Java application that hosts the OPC UA Server and the protocol drivers. The Designer is a visual HMI builder. The runtime front-ends are Vision (legacy Java desktop client) and Perspective (modern responsive web and mobile client). An MQTT Engine module implements the Sparkplug B Pub/Sub specification for IIoT. The commercial model licences per module rather than per tag, which is a major difference from legacy SCADAs such as Wonderware: unlimited tags at no extra cost is a strong driver of the platform's fast growth since 2020.
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