Cited by 131Industrial Automation and Control SystemsIoT Networks and ProtocolsDigital Transformation in Industry

Communication Protocols of an Industrial Internet of Things Environment: A Comparative Study

Open access
Jaloudi, Samer·2019·Future Internet

Abstract

Most industrial and SCADA-like (supervisory control and data acquisition) systems use proprietary communication protocols, and hence interoperability is not fulfilled. However, the MODBUS TCP is an open de facto standard, and is used for some automation and telecontrol systems. It is based on a polling mechanism and follows the synchronous request–response pattern, as opposed to the asynchronous publish–subscribe pattern. In this study, polling-based and event-based protocols are investigated to realize an open and interoperable Industrial Internet of Things (IIoT) environment. Many Internet of Things (IoT) protocols are introduced and compared, and the message queuing telemetry transport (MQTT) is chosen as the event-based, publish–subscribe protocol. The study shows that MODBUS defines an optimized message structure in the application layer, which is dedicated to industrial applications. In addition, it shows that an event-oriented IoT protocol complements the MODBUS TCP but cannot replace it. Therefore, two scenarios are proposed to build the IIoT environment. The first scenario is to consider the MODBUS TCP as an IoT protocol, and build the environment using the MODBUS TCP on a standalone basis. The second scenario is to use MQTT in conjunction with the MODBUS TCP. The first scenario is efficient and complies with most industrial applications where the request–response pattern is needed only. If the publish–subscribe pattern is needed, the MQTT in the second scenario complements the MODBUS TCP and eliminates the need for a gateway; however, MQTT lacks interoperability. To maintain a homogeneous message structure for the entire environment, industrial data are organized using the structure of MODBUS messages, formatted in the UTF-8, and then transferred in the payload of an MQTT publish message. The open and interoperable environment can be used for Internet SCADA, Internet-based monitoring, and industrial control systems.

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  • IIoT implementation in I4.0 manufacturing plants provides numerous benefits in process optimization, cost reduction, enhancing product and control quality, and overall functionality.

    “There are numerous benefits in process optimization, cost reduction, enhancing product and control quality [19], [20], and overall functionality from IIoT implementation in the I4.0 manufacturing plants leveraging multiple information sources of interconnected devices and their computational capabilities.”

    From SCADA Systems With Focus on Continuous Manufacturing and Steel Industry: A Survey on Architectures, Standards, Challenges and Industry 5.0 (2022) · cites this paper as [20]

    The Introduction (page unavailable) describes IoT as a cost-effective ecosystem applicable to industrial environments, and identifies manufacturing as an IIoT application. That provides broad support for a cost benefit, but the paper does not establish that IIoT implementation in Industry 4.0 plants reduces costs or improves process optimization, product and control quality, or overall functionality. (LLM, conf=0.72)

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Research works printed but not linked: 3

  1. Standard IEEE 802.
  2. Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY); IEEE: New York, NY, USA, 2012.
  3. Standard IEEE 754. Binary Floating-Point Arithmetic; IEEE: New York, NY, USA, 2008.

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Authors
Jaloudi, S.
Affiliations
Al-Quds Open University (PS)
Corresponding author
Jaloudi, Samer
Venue
Future Internet
Publisher
MDPI AG
Published
2019-03-07
Volume
11
Issue
3
Pages
66
ISSN
1999-5903 (ISSN-L)
OpenAlex
W2919320025
Cited by
131
References
47
Citations by year
2026: 10 · 2025: 8 · 2024: 18 · 2023: 27 · 2022: 20 · 2021: 29 · 2020: 11 · 2019: 8
FWCI
9.42
Type
journal article
Language
en
Open access
Locations
  • Future Internet (publishedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Physical Sciences › Engineering › Control and Systems Engineering › Industrial Automation and Control Systems
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › IoT Networks and Protocols
  • Physical Sciences › Engineering › Industrial and Manufacturing Engineering › Digital Transformation in Industry
Keywords
Industrial Internet of Things, Modbus TCP, MQTT, publish/subscribe protocol, request-response communication, interoperability, SCADA, message queuing, UTF-8

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