List Of Rs-232C Commands; Rs-232C Commands Outline; Prepared Tools; Command Protocol - Pioneer PDP-507CMX Service Manual

1

9. LIST OF RS-232C COMMANDS

9.1 RS-232C COMMANDS OUTLINE

9.1.1 PREPARED TOOLS

A
It is necessary to prepare the following tools to use RS-232C command.
• PC
• Application for control
• 232C cable (straight)
* It is not likely to operate correctly in Win98 function/ ME and Win for foreign countries.
* The setting of the Com port cannot be communicated if it has not been done correctly.
(Please follow a operating instructions of the PC about the Com port.)

9.1.2 COMMAND PROTOCOL

Communication protocol : Asynchronous serial communication by RS-232C
Start bit length
B
Data width
Parity
Stop bit length
Baud rate
Adjustment function
Direct effectivity of numbers : When a number is transmitted after a command, an adjustment value can be directly set.
Data format
The format of the control signal transmitted from the user side controller is as described below.
STX (02Hex) is arranged at the time of communication start and ETX (03Hex) is arranged at the time of data transmission complete,
and ID, command and parameter are arranged in between. Data consists of ASCII type alphanumeric characters, and there is no
distinction between the upper case and the lower case.
C
STX
0x02
Command processing
Command processing starts as soon as the command is entered.
ID shall be the two asterisks, "∗∗".
Confirmation of reception
The module microcomputer will make judgment to the command received from the main side, and if the command is judged
to be an effective one, processing will be executed. When the system is in the standby status for the next command after
completion of the processing, a reply to the received command is sent out. The data to be responded is a data in the upper
case after deleting the ID code from the received command.
D
When setting/adjustment data is accompanied
Data transmitted from PC
STX
0x02
In the case of command only
Data transmitted from PC
STX
0x02
When responding, ERR is sent back if the command is unknown, and XXX is sent back if the command itself is valid but
E
it cannot be processed because of its status.
Processing in the case of an error
F
If a communication error occurs between STX and ETX, processing of that command is stopped, and the reception buffer is cleared.
In the command reception process, the character string transmitted after the receipt of STX are continued to be stored in the register,
and by receipt of ETX, the character string sandwiched between STX and ETX is recognized as a command. If the prepared character
string storage buffer (24 bytes including STX, ID and ETX) is exceeded, a reply will not be sent out.
164
1
2
: 1 bit
: 8 bit (ASCII code/ no distinction between upper case and lower case)
: None
: 1 bit
: 1200/2400/4800/19200/38400 bps (Initial value : 9600 bps)
In the case of command only
[single function command]
ID Command ETX
∗∗
0x03
ID Command Parameter
∗∗
ID Command ETX
∗∗
0x03
In the case of invalid command
Data transmitted from PC
STX ID Command
∗∗
0x02
In the case of a command not executable due to its status
Data transmitted from PC
STX ID Command
∗∗
0x02
PDP-507CMX
2
3
When setting/adjustment data is accompanied
[setting/adjustment command]
STX ID Command
∗∗
0x02
Reply data
ETX STX Command
0x03 0x02
Reply data
STX Command
0x02
Reply data
ETX STX
0x03 0x02
Reply data
ETX STX
0x03 0x02
3
4
Parameter ETX
0x03
Parameter ETX
0x03
ETX
0x03
Command ETX
ERR 0x03
Command ETX
XXX 0x03
4