eobe Posted July 30, 2014 Share Posted July 30, 2014 Hello, I need help to setup a modbus Geobrick. The Geobrick (master) communicates with a safety PLC (slave) The Modbus protocol says to communicate, you must configure (on the master ) the IP address, the slave number and the register number + function code (3 for Read Holding Registers or 16 for Write Multiple Registers) At PEWIN32, I do not see how to configure the slave number and register number. Can someone explain me? I see, you need to configure the "Modbus reference #", but what data should I put (N° slave + starting adresss?? Unit identifier ?)? When I use a program like "Modbus Doctor", I can read the desired value (see screenshot below). thank you in advance for your help Link to comment Share on other sites More sharing options...
steve.milici Posted August 7, 2014 Share Posted August 7, 2014 There is a description of how this is computed in the Pewin32 Pro2 Software Manual in the section "Modbus Setup Window" on page 44: http://www.deltatau.com/manuals/pdfs/PEWIN%2032%20PRO%202%20SOFTWARE.pdf?id=635415374142578227 Also see the documents at our FTP-site: ftp://support.deltatau.com/DT-USA/Training%20Documents/Modbus/ Link to comment Share on other sites More sharing options...
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