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Energy Management and Automatic Control Systems
Published in Stephen A. Roosa, Steve Doty, Wayne C. Turner, Energy Management Handbook, 2020
Modbus is a serial communications protocol published by Modicon in 1979 for use with its programmable logic controllers (PLCs). Simple and robust, it has become one of the de facto standard communications protocols in the electrical industry. It is now one of the most commonly available means of connecting industrial electronic devices. The main reasons for the extensive use of Modbus are: It has been developed with technical applications in mind.It is openly published and royalty-free.It is easy to deploy and maintain.It moves raw bits or words without placing many restrictions on vendors.
Creating a Reliable IIoT Framework to Prioritize Workplace Safety in Industries Involving Hazardous Processes
Published in Anand Sharma, Sunil Kumar Jangir, Manish Kumar, Dilip Kumar Choubey, Tarun Shrivastava, S. Balamurugan, Industrial Internet of Things, 2022
Nishant Sharma, Parveen Sultana H.
The communication layer provides the paradigms necessary to transfer the preprocessed good data to the upper decision-making layer. Bohm (2018) recommends the Modbus protocol for the communication between the data acquisition and preprocessing layer and the edge. Modbus is the de-facto standard in edge communication facilitating serial communication between Modbus server and Modbus clients. There are many versions of Modbus protocol facilitating TCP, UDP, and RTU (Remote Terminal Unit) communication, among others.
PLC cabling, data transmission, and networking
Published in Raymond F. Gardner, Introduction to Plant Automation and Controls, 2020
Modbus ASCII is an old version, where data is encoded as bits. Modbus RTU is a later generation of Modbus, where the data is encoded using bytes instead of bits, greatly increasing the transmission throughput. RTU is more common in later installations. Modbus TCP/IP5 was developed in 1999 and is the latest generation of Modbus protocol. Modbus TCP/IP is essentially Modbus RTU with a built-in TCP interface to run on the internet.
SCADA Research Lab Kit for Educational Institutes
Published in IETE Journal of Education, 2019
Lagineni Mahendra, Rajesh Kalluri, R.K. Senthil Kumar, B.S. Bindhumadhava, G.L. Ganga Prasad
MODBUS protocol is widely used for real time information exchange among IEDs, RTUs, PLCs, and SCADA control centre. MODBUS protocol is available in 2 variants; one is MODBUS serial another one is MODBUS TCP/IP. The MODBUS TCP/IP messaging service provides client/server communication between devices connected on an Ethernet TCP/IP network. MODBUS TCP/IP frame contains MODBUS Application Header (MBAP header) and Protocol Data Unit (PDU) as shown in Figure 1 [6].
Development of testbed for cyber-manufacturing security issues
Published in International Journal of Computer Integrated Manufacturing, 2020
Mingtao Wu, Jinwoo Song, Snehav Sharma, Jupeng Di, Benliu He, Ziming Wang, Jingkai Zhang, Long Wang Lucas Lin, Emily Ann Greaney, Young Moon
Modbus is a free and open-source protocol that was developed by Modicon for PLCs. As the OpenPLC with raspberry Pi 3 has the capability of connecting to the Ethernet over TCP/IP, it was implemented to support the MODBUS TCP/IP protocol (Alves et al. 2014). The Modbus TCP/IP is the Modbus protocol with a TCP interface that runs on the Ethernet (Goldenberg and Wool 2013).