PLC programming for special solutions

Your plant is unique. So is your PLC program.

We develop PLC programs for special-purpose machines, custom plants, ships and yachts. First we understand your task, then we program exactly the solution it needs.

  • Siemens TIA Portal
  • Safety PLC
  • Marine automation
Motor yacht at dusk, connected to a PLC – automation for industry, ships and yachts.
Your benefit

Solution-oriented programming

Special solutions don't fit into a construction kit. That's why every project starts with your task, not with a template.

Understand first, then program

We clarify the process, constraints and goals before the first line of code is written. That way we solve the actual problem, not just the symptom.

Software you can understand

Structured blocks, meaningful tag names and clean documentation. Your maintenance team will still find its way around years from now.

One contact person to the end

From the first idea through commissioning to service, the same person remains responsible. Short lines of communication, no handover losses.

Standard approach

  • An existing template is adapted
  • Special cases are bolted on later
  • Documentation comes at the end, if at all

Solution-oriented approach

  • Program structure follows your process
  • Special cases are planned from the start
  • Documentation is written alongside the code
Services

What we deliver for you

From a single controller to a complete plant, with a focus on Siemens technology.

Test record

Tested by TÜV NORD

Our safety program for redundant safety applications was tested by an expert for functional safety from TÜV NORD as part of a plant inspection.

We will gladly send you the complete test report on request.

Test object
Siemens safety program “PLe Safety Redundanz”, manufacturer QT-CFS
Scope
Formal and functional test before commissioning
Level achieved
PL e
Test basis
DIN EN ISO 13849, DIN EN 61508
Result
No defects
Test date
30 Sep 2025, Dortmund
Engineer programming a PLC in TIA Portal using ladder logic and SCL.
LAD · FBD · SCL · GRAPH

PLC programming

New PLC programs for special-purpose machines and plants with S7-1500 and S7-1200, structured and documented.

Fail-safe safety PLC with emergency stop button.
IEC 62061 · ISO 13849-1

Safety PLC

Fail-safe controllers with F-CPU and F-I/O: programming, testing and validating safety functions.

Custom-built control cabinet with PLC – special solutions to customer requirements.
Idea · Concept · Implementation

Special solutions

Custom automation for tasks that have no off-the-shelf solution, including retrofits of existing plants.

Yacht bridge with touch panels for alarm, tank and system monitoring.
WinCC · Comfort/Unified Panels

HMI and visualization

Operator interfaces, alarm and monitoring systems that are quick to understand in operation.

Commissioning engineer with a tablet at the shipyard in front of a yacht.
FAT · SAT · Acceptance

Commissioning

Testing, commissioning and acceptance on site, in the factory hall as well as at the shipyard.

Secure remote maintenance of a controller via an encrypted connection.
VPN · Diagnostics · Updates

Service and remote maintenance

Fast support via secure remote access, plus modifications and extensions during operation.

Applications

On land and at sea

Modular PLC with CPU and input/output modules on the DIN rail.

Industry and special-purpose machinery

Controls for machines and plants that have to perform one task particularly well.

  • Special-purpose machines
  • Plant engineering
  • Retrofit
Control cabinet with PLC in the engine room of a yacht – marine automation.

Ships and yachts

Robust automation for engine room, propulsion, pumps and tanks, with alarm and monitoring systems on the bridge.

  • Tank management
  • Alarm & monitoring
  • Energy management
Approach

Four steps to a running plant

Clearly structured, so you always know where your project stands.

  1. Analysis

    We record the process, interfaces and requirements, ideally right at the plant.

  2. Concept

    Program structure, operating concept and safety functions are defined and agreed with you.

  3. Implementation and testing

    Programming with simulation and factory acceptance test (FAT) before going to the plant.

  4. Commissioning and support

    On-site commissioning, site acceptance test (SAT), training and ongoing service.

About us

QT-CFS Consulting Field Service GmbH

Founded
2015
Location
Wurster Nordseeküste, Germany
Programming experience
more than 40 years

We combine control engineering with hands-on experience at the plant and the control cabinet. That's why every program we write keeps in mind the people who will work with it later.

Member of the Deutscher Gutachter und Sachverständigen Verband e. V. (DGuSV, German Association of Professional Experts), register no. DE-8#17024/70-03.

QT-CFS Consulting Field Service GmbH with the DGuSV seals “International Certified Experts Member (ICEM)” and “Zertifizierter Sachverständiger” (certified expert), register no. DE-8#17024/70-03.
Contact

Tell us about your idea

We will get back to you with an initial assessment and a proposal for the next steps.

Our services are aimed exclusively at businesses.