Case studies

Vessel crane control system upgrade

Obsolete controls systems reduce adaptability and are often not supported by original equipment manufacturers (OEM’s) in the event of a failure.

 

Asset:       Construction, flexlay and diving vessel
Location:  Singapore
Date:         2014

 


 

Challenge/objectives

Obsolete controls systems reduce adaptability and are often not supported by original equipment manufacturers (OEM’s) in the event of a failure.

To mitigate the risk of this and to ensure their deck crane on the vessel had sufficient capacity to programme additional steps required to de-rate it, our client appointed the Sparrows Group to upgrade their crane’s control system.

 


 

Solution applied

By supplying and installing a replacement control circuit we provided our client with a solution that allows for future upgrades to be implemented easily and quickly.

 

  • The control circuit was designed to fit with a Siemens S7-400H with high availability which was chosen as the Programmable Logic Controller (PLC)
  • A high availability PLC increases reliability as it consists of two Central Processing Units (CPU) linked over fibre optic so in the event of a failure on one, the other CPU takes over control
  • The design incorporated all the cranes original functionality with the addition of de-rating to allow the pedestal life extension program to take place. As part of the upgrade a new Safe Load Indicator (SLI) was added to allow the crane to conform to BS EN 13852
  • A Human Machine Interface (HMI) was added into the operators cab to display all operational information in an ergonomic design to the operator when performing lifts

 


 

Summary of services/equipment deployed

  • In house control panel design and build
  • PLC & HMI programming
  • Siemens 412H PLC Redundant CPU
  • Siemens ET200M remote I/O station
  • Siemens TP1200 HMI
  • Mipeg 2000R advanced crane load monitoring system
  • Industrial high speed communication network

 


 

Outcome/benefits

The solution applied by the Sparrows Group provides a number of benefits:

  • A high availability PLC to minimise the impact of a failure
  • Real time operator information to improve performance
  • Readily available spares to maximise up-time
  • Accurate manuals and drawings to optimise knowledge
  • Onshore support structure for troubleshooting

 


 

Resources

 

pdf icon  Vessel crane control system upgrade

 

 

Layout Type

Presets Color