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Digitalising Food Production(May 09,2022)

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Stephen Hayes explains how food engineers can get started with digitalisation

The food and beverage industry is one that lends itself nicely to the promised benefits of digitalisation. Whether a food manufacturer wants to reduce food waste in the production process, improve quality control or simply increase efficiency, digital technologies promise a solution. Irrespective of the goal, each outcome stems from the right mix of digital technologies on the production line.


Many digitalisation efforts begin in a fragmented approach, with various areas of a business looking to make their own areas of operation digital. For food manufacturers, it might be that the raw ingredient handling segment has invested in automated equipment and machine vision to control quality more effectively. Alternatively, it may be that a high-speed portioning machine has been introduced that can use camera input and recipe data in a separate platform to process foods at different sizes.


Each of these applications may seem distant from one another but they both rely on fast communication of data between systems, whether that is for process and motion control or for data to be stored and shared between digital platforms.


Data is the essence of digitalisation, so the first step for engineers embarking on a journey to digital transformation is to plan the optimum way of communicating this data between machines and systems. This means to focus on the communication technologies – namely the fieldbuses– in place first, rather than immediately considering new machinery or equipment investments.


Fieldbus and industrial Ethernet-based systems are often overlooked in the digitalisation process because engineers are already familiar with one or several of them. Although these technologies have been around for many years, there are several that are continually developed and built on open standards to keep up to date with the evolving needs of digital technology. Among these, EtherCAT remains one of the best choices due to its high data rates, low cost and deterministic, synchronous nature.


The use of a fieldbus such as EtherCAT is invaluable because it facilitates not only high-speed transmission of data for control or collection purposes, but it does so in a highly efficient way. Each telegram of data is transmitted from the master device – which can be either a fieldbus terminal or a single industrial computer terminal with a PC-based control suite – and passes through each node on a network. Each node takes only the relevant packets of data necessary as the telegram continues to move downstream, eliminating network delays and simplifying synchronous, multi-axis control.


Efficient communication of data on networks allows engineers to ensure that any new automation or digital systems can perform to a higher standard immediately after setup. This is why it is the most important first step for any engineer starting to digitalise the factory floor.


Many new digital technologies bring with them a need for specialist skillsets that some engineers may not necessarily have, such as programming in new languages. One option is to hire specialist help for configuring or programming these systems as needed, but a more cost-effective and long-term option is to find means of integrating this technology into familiar environments. Bringing machine vision programming into a PLC environment, such as with Beckhoff’s TwinCAT Vision for example, makes it easier for engineers to adjust as needed.


Digitalisation, being a term that encompasses so many technologies and areas, can be a difficult thing to navigate for food engineers starting out. Building digitalisation plans from the ground upwards, by starting at the data communication level, is vital to achieving a successful adoption of new technologies that provide long-term value.


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