PLC and fieldbuses
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The document presents an overview of fieldbus technology, emphasizing its role in industrial automation systems for real-time distributed control. It discusses the evolution from analog connections to modern fieldbus protocols developed by major PLC manufacturers and highlights Laumas' solutions for versatile weighing electronics compatible with various fieldbuses. Additionally, it categorizes fieldbuses into wired and industrial Ethernet connections while detailing Laumas' market share and support for multiple communication protocols.
PLC and fieldbuses
- 1. LAUMAS Srl Laumas Webinar 23-24 April 2020 PLC, Fieldbus and Industrial Ethernet
- 2. LAUMAS Srl Introduction: What is a Fieldbus? 2 Fieldbus is the name of a family of industrial computer network protocols used for real-time distributed control. A complex automated industrial system usually needs a distributed control system, an organized hierarchy of controller systems, to function. In this hierarchy, there is usually an HMI (Human Machine Interface) at the top, where an operator can monitor or operate the system. This is typically linked to a middle layer of PLC (programmable logic controllers) via a non-time- critical communications system. At the bottom of the control chain is the fieldbus that links the PLCs to the components that actually do the work. Original source: https://en.wikipedia.org/wiki/Fieldbus
- 3. LAUMAS Srl Fieldbus: The Past 3 In the past the main part of the connections between load cells and PLC were made via analog signal, amplifying the mV/V signal coming from a load cell to 0-10V or 4-20mA
- 4. LAUMAS Srl Fieldbus: Nowadays 4 All the biggest and most popular PLC producers developed their own fieldbus communication protocols. Because of this, plant manufacturers and automation companies are «chained» to the PLC producer given that every component installed in the plant has to «speak» the same language as the PLC. At the same time, if a complex automated industrial system is composed by hundreds of parts all «speaking» the same language, it will make things a lot easier both for the programmer and its whole management.
- 5. LAUMAS Srl Fieldbus: LAUMAS solutions 5 Many PLC manufacturers produce specific weighing modules, compatible with their own PLCs, to handle the signal coming from the load cells. LAUMAS, as specialist in process weighing, developed a wide range of weighing electronics compatible with all the fieldbuses, in order to be as versatile as possible and to offer to its customers the possibility to install LAUMAS products regardless of the PLC or fieldbus to be used.
- 6. LAUMAS Srl Fieldbus: LAUMAS solutions 6 Our range of weighing electronics with integrated fieldbus is suitable for any installation method: - Din rail - Front panel - Integrated with the load cell - Hazardous area - Wall mounting - Column - Desk
- 7. LAUMAS Srl Fieldbus: solutions 7 Fieldbuses managed by LAUMAS: PROFINET/IO PROFIBUS/DP EtherNet/IP DeviceNet EtherCAT Modbus/TCP/IP Ethernet/TCP/IP Wi-Fi Modbus/RTU CANopen POWERLINK CC-Link SERCOS-III IO-Link
- 8. LAUMAS Srl Fieldbus & Industrial Ethernet 8 Fieldbuses can be divided in 2 main families: - Fieldbus: the connection is usually done via wire to a connector or directly to the terminal board. CANopen, PROFIBUS/DP, DeviceNet, CC-Link, Modbus/RTU,IO-Link are all fieldbuses - Industrial Ethernet: the connection is done using a coaxial cable and RJ45 connectors. PROFINET/IO, EtherNet/IP, Ethernet/TCP/IP, Modbus/TCP, EtherCAT, POWERLINK, SERCOS-III are all Industrial Ethernet
- 9. LAUMAS Srl Fieldbus: LAUMAS trend 2012-2019 9 0 500 1000 1500 2000 2500 3000 3500 4000 Fieldbus trend 2012-2019 2012 2013 2014 2015 2016 2017 2018 2019 Serial ports RS485-RS232 with Modbus/RTU protocol are excluded from data
- 10. LAUMAS Srl Fieldbus 2019: LAUMAS share in % PROFINET 44% ETHERNET/IP 24% ETHERNET/TCP/IP 8% PROFIBUS 8% MODBUS/TCP 6% ETHERCAT 5% CANOPEN 3% OTHERS (DEVICENET- SERCOSIII-WIFI-CC-LINK- IOLINK) 1% POWERLINK 1% FIELDBUS SHARE 2019
- 12. LAUMAS Srl PLC: brands and fieldbus 12 Fieldbuses developed/associated to PLC manufacturers: Siemens (DE) = PROFINET/IO & PROFIBUS/DP Allen Bradley (US) = EtherNet/IP & DeviceNet Omron (JP) = EtherCAT & EtherNet/IP Schneider (FR) = Modbus/TCP/IP – EtherNet/IP – CANopen B&R (AT) = POWERLINK Beckhoff (DE) = EtherCAT Mitsubishi (JP) = CC-Link Bosch Rexroth (DE) = SERCOS-III
- 13. LAUMAS Srl PLC: brands and fieldbus 13 European leader: - Siemens with Profinet/IO North & South American leader: - Allen Bradley with Ethernet/IP Other leaders worldwide: - Omron with EtherCat and EtherNet/IP - Schneider Electric with Modbus/TCP and CANopen - Mitsubishi with CC-Link
- 14. LAUMAS Srl PC: Ethernet/TCP/IP 14 Connection to PC: Protocol Ethernet/TCP/IP This kind of protocol is not associated to any PLC manufacturer. It is mainly used to interface a device with a company network or a PC software.
- 15. LAUMAS Srl PLC: fieldbus & configuration files 15 Every device and every fieldbus has its own configuration file. The configuration files, always included with our electronics, must be uploaded onto the PLC and are necessary to allow the PLC to recognize and manage the devices within the communication network present in the automation system. Configuration file names: PROFINET/IO GSDML PROFIBUS/DP: GSD EtherNet/IP: EDS DeviceNet : EDS EtherCAT: ESI CANopen: EDS POWERLINK: XDD CC-Link: CSP SERCOS-III: SDDML
- 16. LAUMAS Srl Fieldbus: how to use filters on www.laumas.com 16
- 17. LAUMAS Srl laumas.com Thanks for your attention!