Pioneer PDP-614MX External Control Manual RS-232C - Manual (Page 5)

PDP-614MX External Control Manual
the lower order 8 bits of one frame of sent or received data comprising the sum total of Command 1, Unit ID 1 and 2,
Command 2, Data Length, and Data.
Check Sum Example
Total 208H
DFH 80H 60H 47H 01H 01H 08H
Command1 Unit ID1 Unit ID2 Command2 Data Length Data Check Sum
2) Error Processing
• When the communication interval is vacant for more than 4 ms, thereafter a received Command 1 will be recognized. If, at
this time, meaningful data cannot be recognized, that data will not be recognized (as valid data).
• An ACK will not be returned unless the receive data error, the check sum error, and the receive data are all taken in.
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