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14 ON-DEMAND DATA COMMUNICATIONS USING USER FRAMES
14.3 On-Demand Function Control Procedure During User Frame Use
Data communications using the binary code
Control procedure when two-word send data (1234H, 5678H) is designated by ONDEMAND instruction
• Set the "Communication protocol setting" to "MC protocol (format 5)".
• Set the "Station number" to "0".
• Set the "Word/byte units designation" to word unit.
• Set the "On-demand user frame specification" items to the following:
Start frame No. 1st: 3ECH
Start frame No. 2nd: 0H (No specification)
Final frame No. 1st: 402H
Final frame No. 2nd: 0H (No specification)
• User frame registration
User frame No. User frame (Registered code) Contents of user frame registration
3ECH(1004) 02H, FFH, 01H, 3BH STX + C24 station No. +;
402H(1026) 03H, FFH, F0H, 0DH, 0AH ETX + sum check code + CR + LF
Sum check code is designated by one byte binary code.
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