easy PROFINET exam questions

Easy level questions

1. Q01

   PROFINET defines three device roles: IO Controller (equivalent to the PLC master), IO Device (equivalent to a slave: sensor, actuator) and IO Supervisor (engineering PC used for diagnostics and configuration).

   TrueFalse

   1. Architecture· Device-Rollen-Modell· Easy

   ▸

   Correct answer

   True

   Learning tip

   The three standardised roles are: IO Controller, which runs the PLC program, reads inputs and writes outputs (Siemens S7, Rockwell ControlLogix, etc.); IO Device, the field equipment such as sensors, actuators, drives or remote IO modules; and IO Supervisor, the engineering PG/PC used for commissioning, debugging and diagnostics (TIA Portal, STEP 7, etc.). A single PROFINET network may host several IO Controllers using the shared device architecture.

   Source: PROFINET System Description, PI (public)

   View the full question page →
2. Q02

   PROFINET supports several physical topologies: star (via switches), line (daisy-chain through ports integrated in the devices) and ring (with MRP for redundancy), and they may be combined within the same network.

   TrueFalse

   3. Topology & cabling· Unterstützte Topologien· Easy

   ▸

   Correct answer

   True

   Learning tip

   PROFINET is topology-flexible: a star uses switches at the centre with devices on branches (the classical IT pattern); a line uses devices equipped with two or more Ethernet ports daisy-chained together, saving cable and switches; a ring is a closed line combined with MRP (Media Redundancy Protocol), which fails over in under 200 ms after a cable break; and mixed topologies are common, with a star backbone and machine-segment lines branching out. Industrial "managed" switches and devices support all of these modes.

   Source: PROFINET Topology and Cabling Guide (PI)

   View the full question page →