adrian223 Posted January 26, 2016 Report Share Posted January 26, 2016 Hi. What is the maximum number of slaves with I can communicate in Modbus rtu ? I think 32 max slaves but i´m not sure Regards Adrian Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted January 27, 2016 MVP 2022 Report Share Posted January 27, 2016 You are correct - 32. Joe T. Quote Link to comment Share on other sites More sharing options...
AlexUT Posted January 27, 2016 Report Share Posted January 27, 2016 Hi Adrian, I will add to what Joe say. Referring to http://www.modbus.org/docs/Modbus_over_serial_line_V1.pdf Number of nodes will be up to 247. (node ID 1 to 247). 1 node is Master. Number of Slaves will be 246. Regular Hardware Transievers reliable supports up to 32 nodes in parallel. So, number of slaves is up to 31. Not so far from what Joe say. B.R. Quote Link to comment Share on other sites More sharing options...
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