Pioneer PDP-614MX External Control Manual page 5

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
DFH 80H
Command1 Unit ID1
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.
PDP-614MX External Control Manual
60H 47H 01H
Unit ID2 Command2 Data Length
Total 208H
01H 08H
Data Check Sum
5