Communication Data Format; Basic Data Format - Panasonic LP-GS Series Serial Communication Command Manual

2-3 Communication Data Format

Use the ASCII code basically for the communication data.
For the characters which cannot be indicated with ASCII code, use Shift JIS code.
The characters enclosed with double quotation marks (" ") in the description below indicate the ASCII code. The
characters enclosed with [ ] indicate the control codes. For the case that you may use the character code other than
ASCII code, it is described in each case.

2-3-1 Basic data format

⿎ Basic data format
Head
Command
Start code
*1
1-byte 3-byte
Item Description
Start code A start code is a code to identify the data head.
Depending on the data type, the start code is fixed as follows:
• Setting request code, readout request code, response code for readout: [STX] 02 (HEX)
• Positive response code: [ACK] 06 (HEX)
• Negative response code: [NAK] 15 (HEX)
Command *1 The alphabetical characters consisting of three characters (3-byte) representing the control
contents.
For command types and description, refer to "3-1 Command List" (P.51).
Sub command *1 One-byte alphabetic character representing the communication data type.
The sub command is fixed to the following alphabetic characters:
• Setting request code: "S"
• Readout request code: "R"
• Response code for readout: "A"
Check sum Check sum is the value to detect an error during data communication.
(RS-232C only) You can enable or disable the check sum. It is disabled in the initial settings.
Check sum cannot be enabled with Ethernet communication.
End code End code is a code to identify the end of data.
• To use RS-232C, select either [CR]: 0D (HEX) or [CR][LF]: 0D0A (HEX).
• To user Ethernet, it is fixed to [CR]: 0D (HEX).
*1 : Included only in the setting request data, readout request data and response data for readout.
• Set the check sum and end code on the "system settings" screen of Laser Marker NAVI smart. Refer to "1-1-3 Settings
before external control" (P.14).
• There is no separating character among the each terms.
• When using the external device set by 2-byte, [NUL]: 00 (HEX) can be used. Add [NUL] before the start code or after the
end code.
Sub command Data defined per data and
*1 command type
1-byte
ME-LP-GS-SR-COMP-3
End
Check sum End code
2-byte 1-byte
or N/A or 2-byte
31