PDP-506PE
43
5678
56
7
8
C
D
F
A
B
E
7 Error process
If an error is generated between STX and ETX, a return signal will not be issued.
• 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 Returns from the PDP
STX
0x02
ETX
0x03
ID
∗∗
Adjustment
Command
VOL
Adjustment
Value
128
STX
0x02
ETX
0x03
Command
XXX
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.
2. Command format
Example of communication: For a command listed on the command list
MR / External PC Returns from the PDP
STX
0x02
ETX
0x03
ID
∗∗
Command
CBU
STX
0x02
ETX
0x03
Command
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 Returns from the PDP
STX
0x02
ETX
0x03
ID
∗∗
Command
AAA
STX
0x02
ETX
0x03
Command
ERR
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