Pioneer PDP-506PE Service Manual page 43

5
2. Command format
7 Communication protocol
Start bit : 1bit
Data : 8bit
Parity : 0 (none)
Stop bit : 1bit
Baud rate : 38400bps
7 Start and stop conditions
STX (start condition): 0x02
ETX (stop condition): 0x03
7 ID setting
No ID setting (corresponding to all ASCII codes)
7 Acknowledgement (ACK)
• Acknowledgement (ACK) will be sent back when the unit returns to Standby mode for the next command after the
process of the received command is finished.
• The return data will be a received command in capital letters, but without an ID.
Example of communication: For a command listed on the command list
MR / External PC
STX ID Command
∗∗
0x02 CBU
• If a received command is not one listed on the command list, "ERR" (3 characters) will be sent back.
Example of communication: For a command that is not listed on the command list
MR / External PC
STX ID Command
∗∗
0x02 AAA
• If the operation of a received command is not possible in a certain status, "XXX" (3 characters) will be sent back.
Example of communication: If an adjustment command that gives an adjustment value out of the adjustable range is sent
MR / External PC
Adjustment
STX ID
Command
∗∗
0x02 VOL
7 Error process
If an error is generated between STX and ETX, a return signal will not be issued.
5
6
Returns from the PDP
ETX STX Command
0x03 0x02
Returns from the PDP
ETX STX Command
0x03 0x02
Adjustment
ETX
Value
128 0x03
PDP-506PE
6
7
ETX
CBU 0x03
ETX
ERR 0x03
Returns from the PDP
STX Command ETX
0x02 XXX 0x03
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8
A
B
C
D
E
F
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