Chapter 6 Applied Instructions ASCII mode The numbers below are only for reference. Instead of showing the values in the ASCII codes, here the expressions are shown in 16# values. ES3 sends the communication command: “ ： 01 05 05 00 FF 00 F6 CR LF” ES3 receives the communication command: “ ： 01 05 05 00 FF 00 F6 CR LF” RTU mode ES3 sends the communication command: “01 05 05 00 FF 00 8C F6” ES3 receives the communication command: “01 05 05 00 FF 00 8C F6” If the format is correct, SM100 is ON. 3. After receiving the data from the DVP-ES2, the PLC confirms the data format sent back from the DVP-ES2 and determines if it is correct.
If no error occurs in the format, the corresponding special flags SM100 are ON; if not SM102 is ON. 4. When the DVP-ES2 receives this instruction, the Y0 is ON. 5. Since this function code writes data, the operand n is ignored. Example 4 6_ 1. Function code 06 (16#06): the PLC writes the state into a word device. 6-541