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Error detection and correction to enhance the data rate of smart metering systems using Modbus-RTU

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Abstract

This work presents a system and method to improve transmission quality in smart meter networks that use Modbus-RTU. Energy management systems in industries, buildings and urban infrastructure use smart meters interconnected in a network. These systems can demand a great quantity of interconnected devices, which sets down increasing requirements to communication networks in terms of transmission quality and speed. At the plant level, Modbus-RTU is the de facto protocol for the interconnection of electric meters. However, since it was created more than 4 decades ago, this protocol imposes constraints to transmission speed, maximum number of interconnected devices and error detection mechanisms. This proposal is applicable to Modbus-RTU meter networks that need to increase data transmission speed to be integrated into smart metering systems but face problems due to the increase in transmission errors caused by noise and electromagnetic interference in the field bus. The effectiveness of the proposed method to increase the data rate while maintaining reliability is studied, and simulation and experimental results are presented.

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Abbreviations

Modbus:

Modicon bus protocol

RTU:

Remote terminal unit

CAN:

Control area network protocol

TCP/IP:

Transmission control protocol/Internet protocol

OPC:

Object linking and embedding for process control protocol

SCADA:

Supervisory control and data acquisition

EIA/TIA:

Electronic industries alliance/telecommunications industry association

FEC:

Forward error correction

RS (n, k):

Reed–Solomon code where n is the number of code symbols and k is the number of data symbols

CRC:

Cyclic redundancy code

R/C:

Error repeating and correcting device

AWGN:

Additive white Gaussian noise

PAM:

Pulse amplitude modulation

Eb :

Energy per bit

N 0 :

Energy of AWGN

BER:

Bit error rate

MER:

Message error rate

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Acknowledgements

This work was supported by the Vicerrectoría de Investigación, Desarrollo e Innovación of the Universidad de Santiago de Chile, Chile.

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  1. Grupo de Automática, Department of Electrical Engineering, Universidad de Santiago de Chile, Santiago, Chile

    Claudio Urrea, John Kern & Claudio Morales

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  1. Claudio Urrea
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  2. John Kern
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  3. Claudio Morales
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Correspondence to Claudio Urrea.

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Urrea, C., Kern, J. & Morales, C. Error detection and correction to enhance the data rate of smart metering systems using Modbus-RTU. Electr Eng 103, 115–124 (2021). https://doi.org/10.1007/s00202-020-01067-7

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