May 2019

| 44 | May 2019 www.smartmachinesandfactories.com | APPLICATIONS | hardware architectural design platform permits the user to choose the programming language and development environment they are most familiar with. MICA is rugged, compact and maintenance-free, and so is suitable for use in the harshest industrial environments. For the plastic moulding manufacturing environment, Harting has developed the MICA EUROMAP 15 and MICA EUROMAP 63 Gateway variants, which convert the legacy EUROMAP 15/63 TCP/IP machine operating communications protocol into OPC UA, for example, via an intermediate JSON software format. This approach also offers the potential to provide IIoT web enablement and access to Cloud services for Big Data analysis or virtualisation, via an optional downloadable MQTT container. All operational software is housed in separate sandbox containers, ensuring that the MICA EUROMAP 15/63 Gateway provides a secure, fully configurable interface to the plant MES/ERP, eliminating expensive custom MES access software licencing charges that may have previously applied. As an established Harting customer, Ypsomed saw the immediate potential benefits of applying this Industry 4.0 Digital retrofit approach in its manufacturing operation at its headquarters in Burgdorf, Switzerland. Ypsomed produces several hundred million products a year and meets the highest medical technology quality standards. Due to the high proportion of individual plastic components in its products, the company possesses a large number of plastic injection moulding machines in its production plants. In order to improve existing levels of plant productivity, Ypsomed has chosen to implement Industry 4.0 process improvements through digitisation at an early stage. To achieve this strategy, Ypsomed selected Harting as a collaborative partner for its development project to connect legacy protocol machines to their MES/ERP system through a digital retrofit approach. In 2017, one of the first tasks was to make data from a legacy injection moulding machine available for analysis. The machine in question only offered the old EUROMAP 15 protocol, and consequently Harting’s Edge Computer MICA was installed and programmed within two days as the protocol translator. Selected production data could then be collected and written to a database for offline analysis. The next goal is to connect several different types of machines to the IT system at Ypsomed’s internal testing and validation centre and present critical operational data remotely at a centralised factory control station. The machines are connected to the MES system via the MICA, which handles the protocol translation between the MES system and the shop floor. Here, the configuration data record belonging to a production order from the ERP system is retrieved from a database and automatically transferred directly to the machine via the MICA, without requiring intervention by a machine operator. Machine process parameters can now be modified more quickly, reducing downtime and enabling manpower to be much more effectively employed. During manufacturing, production and process data are temporarily stored on the MICA and fed back to a database or ERP system for ongoing quality improvement or record storage purposes. Machine operators can even monitor and affect the process of the production line from off-site, via a smartphone or suitable tablet device. The new production plant in Schwerin is planned to start up operations in summer 2019. Automated control of production orders will be implemented by 2020. Condition monitoring Additional real-time condition monitoring of key operating processes can help to reduce downtime and extend lifetime, thus achieving manufacturing productivity improvements. This can be accomplished by digitally retrofitting additional stand-alone MICA devices to store, analyse and process data from existing or extra retrofitted sensors. As a result, tasks such as monitoring pressure, temperature and flow rates becomes easy, whilst allowing remote centralised process control adjustment via the MES network. Communication with the machine fitted sensors is achieved via a simple Ethernet switch and interlinked active I/O blocks. Asset management For asset management, A MICA RFID variant converts the MICA device into a specific RFID Reader, which, when used in conjunction with passive UHF read/write transponders that are fitted to key replaceable mould tools, allows maintenance records to be written and stored onto that particular tool. This can ensure the optimum refurbishment scheduling of high-value mould tools. Predictive maintenance Critical operating parts of a plastic injection moulding machine which are subject to continuous wear and tear include the plasticising screw pump and associated check valves. As wear increases, this can result in a significant number of rejected parts and expensive financial losses. This situation can be resolved by monitoring the changes in the operating power curve characteristics of the screw pump and the pressure loading at the check valves. Integration of a MICA Energy variant provides RS485 Modbus TCP/IP compatible I/O interfaces for linking to the appropriate functional I/O blocks on a machine that access this specific operating data. By pre- setting critical safe operational limits, the MICA Energy can set up alarm conditions for when these limits are breached, allowing machine operators to carry out corrective maintenance as part of the important predictive maintenance process.