DVP-ES3 Series Programming Manual RTU mode ES3 sends the communication command: “ 01 03 10 20 00 08 41 06” ES3 receives the communication command: “01 03 10 12 34 56 78 11 22 33 44 55 66 77 88 99 AA BB CC 90 FE” SM100 is ON if there is no error in the data. After the receiving of the data sent from the DVP-ES2, the PLC confirms the data format sent back from the DVP-ES2. If there are no errors in the format, SM100 is ON; otherwise, SM102 is ON. SM104 is ON if there is no response. Method 2: Using MODRWE instruction The data in D20-D27 of the DVP-ES2 are read when M0 is ON. _6 The following table explains the MODRWE operands.
The communication response between the ES3 series CPU and the DVP-ES2 depends on the mode. 6-590 Operand Description Device S1 Communication port number 16#0001 S2 Unit address 16#0001 S3 Function code 16#0003 S4 Reading the device address of D20 16#1020 S First register for storing the data read D10 n Reading the data length 8 D Flag for completion of reading and writing data M0