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MODBUS with IEC104 convertor

9/13/2010 5:22 PM	Rate (0)
crystal_group Posts: 12 Rating: (1)	Hello! I have a convertor modbus RS485 to IEC 104, W315 -Schneider(in the factory stock, customer) and I need a comunication Modbus, between a S7-1200 slave and the convertor IEC 104. How I give the command to PLC S7 -200. it's ok "MB_SLAVE? but how? Please help me!
crystal_group Posts: 12 Rating: (1)
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9/13/2010 8:18 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 3/22/2025 Posts: 12344 Rating: (2707)	Hello crystal_group; Might I, very respectfully, suggest you access the S7-1200 manual? http://support.automation.siemens.com/WW/view/en/39710145 The MB_SLAVE instruction allows your user program to communicate as a Modbus slave. A Modbus RTU master can issue a request and then your program responds via MB_SLAVE execution.Inserting the MB_SLAVE instruction creates an instance data block.Use this DB name as the MB_DB parameter on the MB_COMM_LOAD instruction. Or you could alternatively search the forum site for more help from members: /tf/WW/en/Posts/46550 Hope this helps, Daniel Chartier

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