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Wireless automation for weight monitoring on independent carriages

Integration of weight sensors without external wiring on ACOPOStrak transport rails.

Wireless automation for weight monitoring on independent carriages

The need

To allow the ACOPOStrack system of B&R to have a complete sensor system on board each independent carriage.

In order to be able to move freely at the same time and to monitor the weight in real time, the carriages must be free of any wiring constraints.

This is also necessary to comprehend the different product types and adapt to their different shapes and dimensions.

Our solution

Our solution stems from our cooperation with CoreTigo, an Israeli company that bases its technology on the IO-Link Wireless standard for wireless development of Industry 4.0.

To meet the customer's needs, on each ACOPOStrak independent carriage we have integrated:

The communication protocol chosen for the digitizer is IO-Link, the same as the wireless technology developed by CoreTigo.
In this way, the two groups of objects can communicate to transfer and convert the original signal to the fieldbus chosen by the customer.

How does it work?

The system consists of a set of shuttles that move individually on the rails and handle the objects individually through the different production processes.

The AF analog load cell is installed on each single shuttle and connected to the LCB.

The universal load cells digitizer LCB IO-Link

The universal load cells digitizer LCB IO-Link

Once connected to the load cell, the universal digitizer transforms the analog signal into a digital signal, allowing the shuttle to have all the advantages of a normal weighing system:

  • calibration;
  • input/output setting;
  • calibration data storage;
  • linearization up to 5 points.

LCB is then connected to the CoreTigo TigoBridge device, a wireless bridge that converts the signal of the devices from IO-Link to IO-Link Wireless and sends them to TigoMaster, an industrial-grade IO-Link master that can receive several wireless signals at the same time.

The LAUMAS and CoreTigo devices, combined together, make it possible to have no cables at all.
The shuttles can move independently on the rails through the various production processes and handle each object individually, while the weight measured by LCB is converted and transferred directly to the PLC without interruption.

How is the signal transferred to the PLC?

The set of objects created by CoreTigo collects the LCB IO-Link signal and converts it into IO-Link Wireless.
The weighing signal is wirelessly transferred deterministically from the shuttle to the PLC, i.e. to the fix part of the application.

The added value

  • no wiring constraints;
  • no electrical or electromagnetic interference caused by the distance between the load cell and the PLC;
  • high weight monitoring capacity;
  • increased system flexibility, efficiency and productivity;
  • easy management of the product while it is moving;
  • reduction in downtime;
  • agile, constant and synchronized product handling;
  • space saving, fewer mechanical components and less maintenance.