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Transcript
8.2 Modbus In the start of modus communication, master will issu a “Query” to the slave. Every slaves will monitor the “Query” address, so as to “execute’ or give “response” when the address is right 8.2.1 Modbus Format The Query-Response Cycle Slave 1 Slave 2 Slave 3 Slave n Master Query Response Query message from Master Device Address Device Address Function Code Function Code 8 bit Data Bytes 8 bit Data Bytes Error Check Error Check Response messages from Slave 31
