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  • Users: dexdyne
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  1. dexdyne

    Linux Modbus TCP slave

    I need to implement a simple-minded modbus-TCP slave in an embedded Linux system. My first port of call would have been TuxPLC, but that seems to have evaporated - anyone know why? In the absence, does anyone have a recommendation about where to start? There seem to be a couple of commercial...
  2. dexdyne

    MUlti-register read on modbus

    I am aware that Modbus is seen as a set of 16-bit registers. I am aware that some of the numbers I'll want to read across a Modbus will need >1 adjacent 16-bit registers - floating point for instance needs 2 or 4. Similarly some data will neeed 32-bit integers, which could suffer in the same...
  3. dexdyne

    Number formats in PLCs

    I'd like to find out what number formats are in use in a representative range of PLCs. I guess there's nowhere better to ask ??? We're reading values out of them across modbus. I want to know what possible formats I an expect to meet. I don't know how much flexibility the PLCs give to the...

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