Adamczewski AD-MM 400 Manual
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Contents
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7.5 Supported FunctionsThe AD-MM 400 supports the following functions as master and slave on the RS-485interface.3 (0x03) Read Holding Registers.16 (0x10) Write Multiple Registers.7.5.1 Read Holding RegistersThis function is used to read one or more registers.Example: The master sends a request with the start address 40801 (0x9F61) And anumber of registers to be read from 2 (0x0002) to the slave:Slave Function RegisterHighRegisterLowNumberHighNumberLowCRCLowCRCHigh1 0x03 0x9F 0x61 0x00 0x02 ... ...If everything is correct, the slave responds with the number of bytes and the registersrequested:Slave Function NumberBytesReg0HighReg0LowReg1HighReg1LowCRCLowCRCHigh1 0x03 4 0x00 0x00 0x00 0x00 ... ...In the event of an error, the slave responds with an error message:Slave Error Code Exception CRC0 CRC11 0x83 see 7.67.5.2 Write Multiple RegistersThis function is used to write one or more registers.The master sends a request with the start address, the number of registers and the Tobe written to the slave:Slave Func. Reg.HighReg.LowNumberHighNumberLowBytes ValueHighValueLowCRCLowCRCHigh1 0x10If all data are correct, the slave responds with the start address and the number ofwritten registers:25 |
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