S133-02S6标准MODBUS-RTU通信模块ENG2021-10.20

UDIANS6 Standard MODBUS-RTU Communication ModuleUser ManualE3578180302030RoHSRoHS1 IntroductionS6 module supports standard MODBUS-RTU communication protocol.It can be installed into instrument'sCOM slot.The device's AF parameter must be set to 0(available for firmware version 8.x).S6 supportsrange of 1~32.The reason to limit the range is the increasing of polling time.Communication settings are 8data bits,1 stop bit,no parity and baud rate from 9600 bps or 19200 bps.It supports 3 function codes 03H,06H and 10H.Function code 03H can read a maximum of 120 words.When the parameters of a device arewithin 120 words,it can be read at a time.Function code 10H has writing length of 8 words.In multi-channeldevices the parameter register is determined according to the Cn parameters(referring to the register table).One device occupies only one address (even multi-channel devices).As a result,maximum 32 units of6-channel device can be connected in a communication line.2 Function Code Description2.1 Function Code 03H (Read Holding Register)Standard MODBUS-RTU response format:FunctionAddr.Starting address ofLength of registerRead RegisteringCRCCodeto readNo.of bytes11222For example,to read the 00H of device with 1,AddrFunctionCodeStartingNo.of registers toCRCread01H03H00H00H00H01H84H OAH1