ModbusTCPModbusTCPModbusRTUModbusTCPModbusRTU協議區別ModbusTCP6+ModbusRTUModbusRTUCRC；也就是說，ModbusTCPModbusRTU6CRC；ModbusTCP6txbuf[000txbuf[100txbuf[200txbuf[300txbuf[400txbuf[5 //AI舉例：8路AI數據，模塊地址ModbusTCP主機發送：000000000006010300320000000000001301031011A112A213A314A415A516A617A7協議頭500001模塊地1模塊地址1寄存器20032H入通道0<4005128<40051-40058協議頭500001模塊地1模塊地址1110HAI*2節8*216【十進制返回數0道1道......數據發送順序：高字節，如11A1，先發DI舉例：8路DI，模塊地址ModbusTCP主機發送：0000000000060102000000從機應答：000000000004010201協議頭500001模塊地1模塊地址1寄存器20000H對應DI0<1000128<10001-10008數協議頭500001模塊地1模塊地址11返回數102H從低位到代表DI0-DI7的輸入狀02HDI-1電平ON，其他低電平舉例：16路DI，模塊地址ModbusTCP主機發送：0000000000060102000000從機應答：00000000000501020203協議頭500001模塊地1模塊地址1寄存器20000H對應DI0<10001216<10001-10016數協議頭500001模塊地1模塊地址11返回數203從低位到代表DI0-DI7的輸入狀FF從低位到代表DI8-DI15的輸入狀FFDI-8--DI-15電平DO舉例：模塊地址ModbusTCP主機發送《DO-0、1DO2-3000000000008010F00000004從機應答《DO-0、1DO2-3000000000006010F000000主機發送《DO：05000000000008010F0000000601從機應答《DO：05000000000006010F000000主機發送《DO：05000000000008010F0000000601從機應答《DO：05000000000006010F000000協議頭500001模塊地1模塊地址1寫寄存器20000H出通道0狀態<00001。。。。。0007H出通道7狀態<00008該寄存器地址位于【0<00001-00008數據發送順序：高字節，如0007，則順序2通道個1寫入01字其中：01H個數8=8寫入數103H000000103H從低位到代表DO0-DO7的開關狀數據發送順序為高字節：030203DO0-02DO8-協議頭500001模塊地1模塊地址1寫寄存器2址2通道個5.DO舉例：模塊地址ModbusTCP主機發送《DO-0000000000006《TCP從機應答《DO-0000000000006《TCP主機發送《DO-0000000000006《TCP從機應答《DO-0000000000006《TCP主機發送《DO-1000000000006《TCP從機應答《DO-1000000000006《TCP主機發送《DO-1000000000006《TCP從機應答《DO-1000000000006《TCP主機發送《DO-2000000000006《TCP從機應答《DO-2000000000006《TCP主機發送《DO-2000000000006《TCP從機應答《DO-2000000000006《TCP主機發送《DO-3000000000006《TCP從機應答《DO-3000000000006《TCP主機發送《DO-3000000000006《TCP從機應答《DO-3000000000006《TCP主機發送《DO-4000000000006《TCP從機應答《DO-4000000000006《TCP主機發送《DO-4000000000006《TCP從機應答《DO-4000000000006《TCP主機發送《DO-5000000000006《TCP從機應答《DO-5000000000006《TCP主機發送《DO-5000000000006《TCP從機應答《DO-5000000000006《TCPDO_0=1:協議頭500001模塊地1模塊地址1寫寄存器20000H通道0<00001。。。。。0007H通道7<000