Table · Chapter 6

Key figures of the platform

Cycle time, signal paths, monitoring and components used in the test rig.

Rows: 16
Columns: 2

Download CSV To the chapter: Chapter 6 — System architecture

Values
Source and citation

Values

Key figures of the platform

Metric	Value
Target cycle	20 Hz, fixed step size Δt = 50 ms (measured mean 17.9 Hz on the Windows development computer)
Integration	explicit Euler method, x(k+1) = x(k) + f(x(k), u(k))·Δt
Signal path controller → model	12 channels
Signal path model → controller	10 channels
Monitoring	heartbeat every 0.5 s, three-stage watchdog (2 s)
Controller	Siemens LOGO! 12/24RCE + expansion DM16 24R
Level conversion, forward path	PC817 optocoupler, 24 V → 5 V, galvanically isolated
Level conversion, return path	relay boards 5 V → 24 V, potential-free contact
Signal bridge	Arduino Mega 2560, serial protocol over USB, 115200 baud
Gateway	FastAPI, port 8100: bridge serial ↔ HTTP
Orchestrator	FastAPI, port 8050: simulation cycle and distribution of results
Model interface	compute_step(inputs, dt) → plant, sensors, outputs_logical
Control panel	12 push buttons, 12 indicator lights, in parallel to the controller
Tank volume	0.5 m³ (500 l)
Heating power	up to 150 kW, PT1 lag with τ = 12 s
Alarm thresholds	sensor B3 from 95 °C, sensor B4 from 2.8 bar; safety valve at 3.5 bar

Source and citation

Data source: Eigene Zusammenstellung aus der Bachelorarbeit (2026) — see Chapter 6 — System architecture.

How to cite

Kotsch, A. H. (2026): Dataset „Key figures of the platform“. Supplement to the bachelor thesis „Digital twins for PLC-coupled laboratory systems“, Duale Hochschule Sachsen — Studienakademie Glauchau. https://thesis.kotsch.tech/daten/kennzahlen-plattform (accessed 2026-11-14).

More datasets

3,000 rows · 9 columns Scenario 1 — Filling View → 6,000 rows · 9 columns Scenario 2 — Heating with PT1 behaviour View → 25,809 rows · 9 columns Scenario 3 — Pressure build-up and venting View → 2,200 rows · 9 columns Scenario 4 — Draining View → 1,200 rows · 9 columns Scenario 5 — Edge case: empty tank View → 5 rows · 4 columns Five test scenarios — expectation versus measurement View →