Twitter Facebook RSS Schrijf je nu
in voor de

Internship controls (Mechatronics or Industrial automation)


In much of the deck equipment hydraulic cylinders are used for machine movements. Hydraulic pressure is needed to move a cylinder. The amount of flow and pressure defines how much the cylinder will extent or retract and how fast. The PLC must control the amount of flow to control the cylinder. A typical setup is depicted below:

Existing method
The PLC outputs 0-10 volts to the amplifier. The amplifier controls the valve which actual is a set of coils. By controlling the amount of current the amplifier controls the amount of flow.
There two main reasons to use an amplifier:

  • The PLC usually cannot create enough current to control the valve.
  • The relationship between the amount of current and the opening of the valve is not a simple linear function.

Proposed improvement
IHC is constantly looking to improve our products ( in quality and cost reduction). Although using an amplifier is a standard "way of working" we want to investigate the possibility of controlling the valve directly from the PLC. This has several advantages:

  • Cost reduction. An amplifier costs €250 and there are many used in a machine
  • Less space used in Control cabinet
  • Less wiring to be done and tested
  • Making software archive simpler. All parameters are stored in the PLC program instead of having a separate program for the amplifier.

To control the valve Siemens has an output card that can be used to create PWM ( pulsed width modulation). This card is capable of creating a current up to 2 amps. Enough for most of the valves used in the machine. Although the output voltage is 24 volts by creating a PWM signal the amount of current can be controlled.

Software must the following requirements:

  • It must be capable of entering the needed characteristics of the valve and cylinder in to the software.
  • Using these characteristics the software must create the correct PWM timing to control the cylinder.
  • Position control software must be created using a position feedback signal from the cylinder. The higher level software can use this to give a "goto position X" to a cylinder.

Make a cost comparison between the existing solution an proposed solution.

  • Together with an electrical and hydraulic engineer create a bench test environment ( PLC , HPU , power supply, cylinder etc.)
  • Gain knowledge of how valves and cylinders work together. Which characteristics are involved and how they interact.
  • Define the requirements for the software.
  • Create a test document.
  • Write a software program for a Siemens PLC.
  • Carry out the described tests and archive the results
  • Write a summary report and present this to the engineering department.

To be eligible for this position, you must have the following:

  • excellent communication skills spoken and written in English
  • only candidates with work visa will be considered as viable candidates
  • studying Mechatronics or Industrial automation with a sufficient focus on technology.

Terms of employment
Royal IHC offer you a challenging internship job within a successful and dynamic company with a reputation for being a worldwide leader in technological innovation. In addition, we offer you a competitive salary, professional development opportunities, travel allowance, profit share, pension allowance, training courses and at least 40 days of leave per year.

Contact information
Are you interested in the position internship and do you recognise yourself in the job description? Please respond directly through our website: or by using the apply button.

For more information about Royal IHC, the vacancy and the application process, please visit or call the Staffing department on +31 (0)88-015 4444.

Uiteraard is het ook mogelijk om in het Nederlands te reageren op deze positie.

Royal IHC does not approve of commercial, contractor and/or agency acquisition or commercial use of this advertisement. Proposing candidates without invitation is not appreciated and will not be considered by IHC.



IHC SAS-Hytop is a member of the Royal IHC group, one of the leading companies in the offshore world of mining, dredging and pipelay. IHC SAS-Hytop ( from now on IHC ) is situated in Alphen a/d Rijn and Sliedrecht. For this project Alphen a/d Rijn will primarily be the location.
Core business of IHC is the development, production and installation of offshore deck equipment used for pipe lay operations world-wide.
Examples of deck equipment are tensioners, storage winches, traction winches.



MVB ID #176879
Plaatsingsdatum maandag 15 oktober 2018
Locatie Alphen aan den Rijn
Dienstverband Stage
Opleidingsniveau HBO
Sector Maritieme Dienstverlening
Functiecategorie Afstudeerstages
Regio Nederland, Zuid-Holland


Referentie a2w57000000tCh4AAE
Bedrijfsnaam IHC
ContactpersoonMevr. Femke van Es
Telefoon +31 78 691 0984

Postbus 1
2960 AA Kinderdijk

Alle banen



Navingo BV, Jan van Galenstraat 56, 3115 JG Schiedam, T:+31 (0)10 2092 600, F:+31 (0)10 436 8134