Alexander Rupp - PLC CPU Migration for Oxygen Control

Q: Where is Alexander based?

Alexander is based in Schöntal, Germany .

Q: What languages does Alexander speak?

Alexander speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Alexander have?

Alexander has at least 21 years of experience. During this time, Alexander has worked in at least 35 different roles and for 24 different companies . The average length of individual experience is 1 year and 7 months . Note that Alexander may not have shared all experience and actually has more experience.

Q: What is Alexander's latest experience?

Alexander's most recent position is PLC CPU Migration for Oxygen Control at Abwasserentsorgung Schöntal .

Q: What companies has Alexander worked for in recent years?

In recent years, Alexander has worked for Abwasserentsorgung Schöntal , Messer Cutting Systems GmbH , Willibald GmbH , Leoni Bordnetzsysteme GmbH , and Aircraft Electronic Engineering GmbH .

Q: Which industries is Alexander most experienced in?

Alexander is most experienced in industries like Manufacturing , Utilities , and Automotive . Alexander also has some experience in Energy , Aerospace and Defense , and Agriculture .

Q: Which business areas is Alexander most experienced in?

Alexander is most experienced in business areas like Product Development , Operations , and Project Management . Alexander also has some experience in Quality Assurance , Research and Development , and Production .

Q: Which industries has Alexander worked in recently?

Alexander has recently worked in industries like Utilities , Manufacturing , and Automotive .

Q: Which business areas has Alexander worked in recently?

Alexander has recently worked in business areas like Product Development , Operations , and Project Management .

Recommended expert

Schöntal, Germany

Experience

Nov 2025 - Nov 2025

1 month

PLC CPU Migration for Oxygen Control

Abwasserentsorgung Schöntal

Migration of a Wago PLC from CODESYS V2 to CODESYS V3.5
Porting existing software from V2 to V3.5
Performing various software adjustments
Creating a new web visualization (WebVisu)
Installing the new controller and commissioning on site
Updating the wiring diagrams

Oct 2025 - Oct 2025

1 month

Electrical upgrade of flood pump station

Abwasserentsorgung Schöntal

Planning the electrical upgrade
Creating wiring diagrams
Modifying the control cabinet
Developing the operating software based on CODESYS V3.5 for WAGO 750 controller
Commissioning and documentation

Apr 2025 - Dec 2026

1 year 9 months

Development of various assemblies – burner ignition systems

Messer Cutting Systems GmbH

Developed a power supply (48 VDC / 250 W)
Developed an LED camera ring light
Redesigned a laser detector
Autogenous cutter ignition unit (measurements, simulation with LTspice, interference suppression)
Ring light for camera unit (schematic, PCB layout, prototyping, mechanical integration, testing)
Developed a power supply (50 VAC -> 48 VDC / 250 W)
Redesigned a laser cut-through detection (component obsolescence research, schematic, PCB layout)

Feb 2025 - Mar 2025

2 months

Development of PFC boost converter 110 VAC -> 300 VDC (600 W) for inverter power supply

Calculating and designing the components
Sourcing the components
Creating the schematic and layout
Producing prototypes and commissioning

May 2024 - Nov 2024

7 months

Refurbishment of wastewater pump stations for process control system

Abwasserentsorgung Schöntal

Extending pump station control software in CODESYS V2
Implementing Modbus TCP communication
Developing a process control system (PCS) in C# for the central control center
Planning an SHDSL line route, connection, configuration, and commissioning
Modifying control cabinets in the pump stations

Mar 2024 - Apr 2024

2 months

Development of Vibration Measurement Technology for Shredders

Willibald GmbH

Basic development of vibration measurement
Selecting suitable components
Conducting tests and trials on customer systems
Programming a controller in CODESYS V3.5 to regulate hydraulic proportional valves (material feed vs. motor load)

Nov 2023 - Mar 2025

1 year 5 months

Development Support for Battery Balancers

Leoni Bordnetzsysteme GmbH

Commissioning and measurements on battery balancer systems
Firmware development in C for Atmel SAM controllers for test setups
Performing schematic and layout reviews
Designing DC/DC buck-boost circuits

Oct 2023 - Oct 2023

1 month

Control Technology Retrofit for Inlet Screens

Abwasserentsorgung Schöntal

Planning the retrofit measures
Creating electrical diagrams
Modifying the control cabinet
Implementing new control technology based on WAGO 750
PLC programming in CODESYS V2

May 2022 - Jul 2023

1 year 3 months

Development of Electronic Assemblies for Aviation

Aircraft Electronic Engineering GmbH

Circuit design and layout with Altium Designer according to DO-160G
Circuit simulation with LTspice
Firmware development in C for AVR and STM32 controllers

Jan 2022 - Apr 2022

4 months

Development of a Measurement Unit for Filter Monitoring with Modbus RTU Interface

BSO GmbH

Circuit design
Layout with Target V16
Prototyping (SMD assembly and condensation soldering)
Firmware development in C based on STM32G0
Creating device documentation

Sep 2021 - Dec 2021

4 months

Development of a temperature and pressure measuring unit with Modbus RTU interface

KSB AG

Creating the requirements specification
Circuit design
Layout with Target V16
Prototyping (SMD assembly and condensation soldering)
Firmware development in C based on STM32L4

Aug 2018 - Aug 2021

3 years 1 month

Hardware and firmware development

Würth Elektronik ICS GmbH & Co. KG

Development of power distribution electronics for mobile work machines
Pre-development of new technologies
Working on new product innovations
Creating firmware for STM32 controllers
Acting technical lead of the development team

Feb 2018 - Jul 2018

6 months

Freelance development of a 10 W AC/DC converter with low profile

Bürkert GmbH

Circuit design
Sizing and sourcing components
PCB layout and prototype manufacturing
Conducting tests and trials

Jan 2018 - Jul 2018

7 months

Own hardware and firmware development projects

Provitec GmbH

Development of a smart meter SML/D0 converter on Modbus RTU to read digital electricity meters
Circuit design, PCB layout and prototype manufacturing
Firmware development in C for protocol conversion
Development of infrared interfaces for electricity meters
Development of an Ethernet switch for custom integration of solar charging stations
Circuit design, PCB layout and prototype manufacturing
Small series production with condensation soldering

Jan 2017 - Dec 2017

1 year

Freelance development of an LCD panel for a charge indicator

Ansmann AG

Circuit design and PCB layout
Fabrication of prototypes in SMD with condensation soldering
Firmware development in C (LCD control and I²C communication)

Jan 2017 - Dec 2017

1 year

Self-initiated Project: Parts Flow Control

IFC GmbH

Programming a FESTO controller with CodeSys V3
Implementing image processing with a system camera

Jan 2017 - Dec 2017

1 year

Self-initiated Project: Vibration Measurement Technology Enhancement

KSB AG

Developing a miniaturization concept
Creating circuit diagrams and PCB layouts
Building prototypes and a small series (condensation soldering)
Designing a custom enclosure and 3D printing

Jan 2017 - Dec 2017

1 year

Self-initiated Project: 20 mA–RS485 Converter for Sensor Interface

Mollet GmbH

Conceptualizing the solution
Circuit design and PCB layout
Manufacturing prototypes in SMD with condensation soldering
Developing firmware in C
Developing configuration software (Windows) in C#
3D design of the board holder for an existing enclosure

Jan 2016 - Dec 2022

7 years

Retrofit of Wastewater Pumping Stations

Gemeinde Schöntal

Planning the electrical retrofit measures
Upgrading the plants
Implementing new control technology with WAGO 750
PLC programming in CodeSys (ST)
Creating wiring diagrams
Integrating the plants into remote control technology

Jan 2016 - Dec 2016

1 year

Self-initiated Projects: Vibration Sensor Measurement Circuit and GSM Telemetry Device

KSB AG

Developing a vibration sensor measurement circuit
Circuit design and PCB layout
Producing prototypes in SMD
3D design of a special enclosure for magnetic mounting
Developing a GSM telemetry device (base unit and GSM module)
Circuit design and PCB layout
Producing prototypes in SMD
Preparing and supporting EMC tests
Supporting series production

Jan 2016 - Dec 2016

1 year

Freelance development support

Lear Corporation

Design verification of electronic assemblies
Measurement of signal integrity under different climatic conditions

Jan 2015 - Apr 2016

1 year 4 months

Freelance development of a GSM telemetry system

Agri-Espri SAS

Independently developed a GSM telemetry system for soil sensor and GPS data
Reading data from soil sensors and GPS position data
Integrating data into XML
Transmitting data via GSM technology to cloud servers
Circuit design and PCB layout
Building prototypes and small batch production
Firmware development in C for AT90CAN128
3D design of enclosure components and 3D printing

Jan 2014 - Dec 2014

1 year

Personal project: Monitoring hose couplings with RFID

Mollet GmbH

System development for monitoring hose couplings with RFID (readers, bus distributors, power supplies)
Concept development based on customer requirements
Circuit design and PCB layout
Firmware development in C

Jan 2014 - Dec 2014

1 year

Freelance support and further development of test benches for software testing

Schneider Electric GmbH

Setting up and maintaining test benches for software testing
Programming in Python
Programming in C#
XML and CodeSys V3 programming
Administration of the CruiseControl system

Jan 2013 - Dec 2013

1 year

Freelance development for LED taillights

Odelo GmbH

Circuit design and PCB layout
Leading co-development of the first wiper indicators (Audi)
Troubleshooting returned parts

Jan 2011 - Dec 2012

2 years

Own projects portal lifting systems and self-propelled vehicles (SEFIRO)

Greiner Fahrzeugtechnik GmbH

Electrical engineering planning for portal lifting systems up to 1000 t
Selection of control, sensor and actuator components
Development of control software for IFM mobile controllers based on CodeSys V2
Development of an algorithm for equal and relative lift control
Complete assembly of the electrical installations
Electrical engineering planning for self-propelled vehicles (SEFIRO) up to 250 t
Selection of control, sensor and actuator components
Development of control software for IFM mobile controllers based on CodeSys V2
Development of an algorithm for a multi-axis multi-joint system
Control and monitoring of diesel engines (Kubota, Deutz)
Complete assembly of the electrical installations

Jan 2010 - Dec 2010

1 year

Own projects electronics and firmware development

Würth Elektronik ICS GmbH & Co. KG

Development of a 2.4 GHz ISM concentrator (iBin) for IoT
Conducting preliminary tests and feasibility studies
Image processing evaluation
Leading development of circuit and layout in collaboration with Würth ICS USA
Driver development for SPI2Air interface, arbitration, automatic address assignment and transmission protocol for image data
Development of an RFID scanner for KLT storage boxes
Preliminary tests and feasibility analysis
Circuit design and PCB layout
Antenna development, tuning and calibration
Firmware development based on an RTOS at SC24
Development of a climate control panel for BE-Aerospace
Circuit design and PCB layout
Power supply design for special requirements of the aircraft power network

Jan 2009 - Dec 2009

1 year

Own project combined heat and power plant (BAFA approval no. 127067)

HSD

Planning and feasibility analysis of a combined heat and power plant
Complete mechanical assembly (welded construction)
Electrical engineering planning and setup, connection to the utility company
Development of operating software based on CodeSys V2
Operation of the CHP unit from 2009 to 2014 with approx. 11,000 operating hours and a measured efficiency of 92%

Jan 2009 - Dec 2009

1 year

Own project display panel for pump control unit

KSB AG

Leading development of a customer-specific LCD glass
Circuit design and PCB layout
Prototype assembly
Firmware development in C

Jan 2009 - Dec 2009

1 year

Own project industrial laser measurement of cardboard stacks

Mondi AG

Preliminary tests and feasibility studies
Use of a 3D measurement laser
Planning and setup of the measurement system at two sites
Development of a measurement algorithm to detect defective products
Measurement method successfully filed for a European patent (pat. no. 10 2009 053 561)

Jan 2008 - Dec 2008

1 year

Independent project redesign of control system for book block press

Sigloch Maschinenbau GmbH

New development of the PLC software for a Moeller PLC based on CodeSys V3
Creation of the visualization for the operator panel
Parameterization of the servo axes

Jan 2007 - Dec 2007

1 year

Hybrid

Freelance testing and verification of control brake system for hybrid vehicles

Daimler AG, MTC Sindelfingen

Testing and verification of a control brake system for S- and M-Class hybrid vehicles
Developing tests on HIL test benches (ETAS)
Conducting test drives on the factory test track

Jan 2007 - Dec 2007

1 year

Independent project galvanically isolated USB-RS485 converter

HSD

Circuit design and PCB layout
Building prototypes and small series

Jan 2007 - Dec 2007

1 year

Independent project I/O module for controlling surveillance cameras

Visio AG

Circuit design and PCB layout
Building prototypes and pilot run
Firmware development in C for 8051 with CAN interface

Jan 2006 - Dec 2006

1 year

Freelance reverse engineering of CAN protocol for frequency converter

KSB AG

Analysis of a proprietary CAN protocol for a frequency converter
Protocol synthesis through firmware development in C based on a Fujitsu F16LX/FX
Analysis and synthesis of an RS485 Modbus protocol
Firmware development for a CAN-RS485 protocol converter
Adapting the embOS RTOS from Segger

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Manufacturing, Utilities, Automotive, Energy, Aerospace and Defense, and Agriculture.

Manufacturing

Utilities

Automotive

Energy

Aerospace and Defense

Agriculture

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Product Development, Operations, Project Management, Quality Assurance, Research and Development, and Production.

Product Development

Operations

Project Management

Quality Assurance

Research and Development

Production

Skills

Hardware Development
Firmware Development In C
Prototype Manufacturing Of Electronic Assemblies In Through-hole And Smd
3d Design Of Parts And Assemblies For Integration Of Electronic Assemblies, 3d Printing
Communication Knowledge: Rs232, Rs485, Can, Ethernet, Usb, Spi, I²c, Various Communication Protocols (Modbus, Canopen, J1939, ...)
Operating Systems: Windows, Linux
Programming Languages: C, C#, Codesys (V2, V3)
Cad Systems: Wscad, Target 3001, Altium Designer, Ansys Spaceclaim
Fields And Expertise: Development Of Electronic Assemblies (Circuit Design, Layout, Prototyping, Series Production), Application Programming In C#, Low-level Programming (Firmware, System Software), Feasibility Analyses, Project Management
Industries: Mechanical Engineering, Industry, Research And Development
Other: Mag, Mig And Tig Welding Training, Cmas/tl2 Diving Instructor License, Lecturer At Mosbach Cooperative State University For Microcontroller Programming

Languages

German

Native

English

Advanced

Education

State-certified Electrical Technician (HTL) · Communication Engineering

Certifications & licenses

MAG, MIG and TIG welding training

DVS

CMAS/TL2 diving instructor license

Statistics

Experience

Total positions 35

Experience in Manufacturing 16 y

Avg length 1 y

Longest experience 6 y 11 m

Expertise

Recent roles PLC CPU Migration for Oxygen Control, Electrical upgrade of flood pump station, Development of various assemblies – burner ignition systems

Main industries Manufacturing, Utilities, Automotive

Main business areas Product Development, Operations, Project Management

Qualifications

Certifications earned 2

Profile

Created

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Alexander based?

Alexander is based in Schöntal, Germany.

What languages does Alexander speak?

Alexander speaks the following languages: German (Native), English (Advanced).

How many years of experience does Alexander have?

Alexander has at least 21 years of experience. During this time, Alexander has worked in at least 35 different roles and for 24 different companies. The average length of individual experience is 1 year and 7 months. Note that Alexander may not have shared all experience and actually has more experience.

What roles would Alexander be best suited for?

Based on recent experience, Alexander would be well-suited for roles such as: PLC CPU Migration for Oxygen Control, Electrical upgrade of flood pump station, Development of various assemblies – burner ignition systems.

What is Alexander's latest experience?

Alexander's most recent position is PLC CPU Migration for Oxygen Control at Abwasserentsorgung Schöntal.

What companies has Alexander worked for in recent years?

In recent years, Alexander has worked for Abwasserentsorgung Schöntal, Messer Cutting Systems GmbH, Willibald GmbH, Leoni Bordnetzsysteme GmbH, and Aircraft Electronic Engineering GmbH.

Which industries is Alexander most experienced in?

Alexander is most experienced in industries like Manufacturing, Utilities, and Automotive. Alexander also has some experience in Energy, Aerospace and Defense, and Agriculture.

Which business areas is Alexander most experienced in?

Alexander is most experienced in business areas like Product Development, Operations, and Project Management. Alexander also has some experience in Quality Assurance, Research and Development, and Production.

Which industries has Alexander worked in recently?

Alexander has recently worked in industries like Utilities, Manufacturing, and Automotive.

Which business areas has Alexander worked in recently?

Alexander has recently worked in business areas like Product Development, Operations, and Project Management.

What is Alexander's education?

Alexander attended education in Communication Engineering.

Does Alexander have any certificates?

Alexander has 2 certificates. These include: MAG, MIG and TIG welding training and CMAS/TL2 diving instructor license.

What is the availability of Alexander?

Alexander is immediately available for suitable projects.

What is the rate of Alexander?

Alexander's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.