Chapter 6 Applied Instructions ASCII mode You do not need to convert the ASCII codes, and they are all expressed in 16# values. ES3 sends the communication command: “ ： 01 03 10 20 00 08 C4 CR LF”. ES3 receives the communication command: “ ： 01 03 10 12 34 56 78 11 22 33 44 55 66 77 88 99 AA BB CC AA CR LF”. 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”. If the format is correct, SM100 is ON. The response messages from the DVP-ES2 is stored in registers D10 to D17. The following table lists the values in D10–D17. 4.
After the receiving the data sent back from the DVP-ES2, the PLC confirms the data format sent back from DVP-ES2 and determines if it is correct. If no error occurs in the format, the corresponding special flags SM100 are 6_ ON; if not SM102 is ON. 6-539 Device D10 D11 D12 D13 D14 D15 D16 D17 Value (16#) 1234 5678 1122 3344 5566 7788 99AA BBCC