DVP- ES2/ EX2/ SS2/ SA2/ SX2/ SE&TP O pe r a t i on Ma nua l - Pr ogr am m i ng3- 368RTU mode (M1143 = ON):When X0 = ON, MODRW instruction executes the function specified by Function Code 03PLC VFD-B, PLC sends: ” 01 03 2100 0006 CF F4”VFD-B PLC, PLC receives: “01 03 0C 0000 0503 0BB8 0BB8 0000 012D 8E C5”Registers for data to be sent (sending messages)Register Data DescriptionsD1256 Low byte 01 H AddressD1257 Low byte 03 H FunctionD1258 Low byte 21 H Data AddressD1259 Low byte 00 HD1260 Low byte 00 H Number of data (count by word)D1261 Low byte 06 HD1262 Low byte CF H CRC CHK LowD1263 Low byte F4 H CRC CHK HighRegisters for received data (responding messages)Register Data DescriptionsD0 low byte 01 H AddressD1 low byte 03 H FunctionD2 low byte 0C H Number of data (count by byte)D3 low byte 00 H Content ofaddress H21000000 HPLC COM2 automaticallystores the value in D1296D4 low byte 00 HD5 low byte 05 H Content ofaddress H21010503 HPLC COM2 automaticallystore the value in D1297D6 low byte 03 HD7 low byte 0B H Content ofaddress H21020BB8 HPLC COM2 automaticallystores the value in D1298D8 low byte B8 HD9 low byte 0B H Content ofaddress H21030BB8 HPLC COM2 automaticallystore the value in D1299D10 low byte B8 HD11 low byte 00 H Content ofaddress H21040000 HPLC COM2 automaticallystore the value in D1300D12 low byte 00 HD13 low byte 01 H Content ofaddress H2105012D HPLC COM2 automaticallystore the value in D1301D14 low byte 2D HD15 low byte 8E H CRC CHK LowD16 low byte C5 H CRC CHK HighProgram example 4: COM1(RS-232) / COM3(RS-485), Function Code H03 (The function codeH04 is the same as the function code H03.)1. Function code K3 (H03): read multiple Word devices, up to 16 words can be read. For COM2ASCII mode, only 8 words can be read..2. PLC COM1 / COM3 stores the received data in registers starting from S, and the stored datacan be transformed and moved by using DTM instruction for applications of other purposes.
