About 77,300 results
Open links in new tab
  1. Introduction to Modbus and Modbus Function Codes

    Jan 30, 2023 · Introduction to Modbus and Modbus Function Codes Modbus is one of the oldest industrial communication protocols still in use today. Continue reading to find out how the …

  2. Modbus: The Original Industrial Fieldbus Protocol

    Sep 2, 2025 · This article introduces Modbus, an industrial protocol that laid the foundation for fieldbus communication in industrial systems.

  3. Communication problems , modbus timeout error | Automation

    Aug 14, 2020 · Early Modbus was memory-limited so addressing was so-called 5-digit addressing, limited to (4)9999 (decimal) because Modbus devices never needed more than …

  4. Making Modbus device communicate with a PC - Control.com

    Jul 26, 2007 · I am learning more about MODBUS, and I would like to know how I make the Modbus device communicate with the PC. Like for example, how do I gather outputs/inputs …

  5. How to map floating point values in MODBUS? - Control.com

    May 10, 2004 · If you have floating point values to "present" to a Modbus master I presume you intend your instrument to be a Slave. In this case you would have to respond to a command #3 …

  6. Modbus client application | Automation & Control Engineering …

    Jan 9, 2024 · Open Modbus adds two other IEEE754 32 bit floating formats with its LE button which selects between Big Endian and Little Endian. Win-tech two standard FP formats …

  7. Modbus Protocol vs TCP/HTTP Protocol - Control.com

    Jan 11, 2011 · Modbus and HTTP are application level protocols, which means they provide some organization and meaning to the data so your software can make sense of it. Modbus is a very …

  8. Modbus over serial line "parity" question - Control.com

    Mar 4, 2014 · Modbus over serial-line v1.02 talks about parity MUST be "even" is RTU mode and 'no' parity as preferable on page 12. The next line the spec says "devices may accept all …

  9. Modbus errors | Automation & Control Engineering Forum

    May 22, 2012 · Modbus Poll is the master and you must disconnect the existing master before using it. If the situation is that you actually use Modbus Poll as master the problem could be …

  10. time stamping using MODBUS | Automation & Control …

    Dec 12, 2003 · Is there any way time stamping can be done using MODBUS protocol? i know that Modbus has the limitation of time stamping... but is there any software to enable time …