Communication Data Format; Command Data; Command Data Format - Panasonic LP-M Series Serial Communication Manual

2-5 Communication Data Format

Use the ASCII code basically and the shift-JIS code partially as characters for communication when controlling the laser
marker by external device.
The characters (or character strings) enclosed with double quotation marks (" ") in the description below indicates that
they uses the ASCII code.
When using the shift-JIS code, it is described in each case.

2-5-1 Command data

The word "command" means the instruction which is sent to the laser marker from external device. Command data is
created with the specified format. Remote control of laser marker or execution of specified procedures are possible by
sending the command data to laser marker.

■ Command data format

Start code
Single character Three characters
Head
Code
Start code
Command
Sub command
Data
Check sum *1
Delimiter *2
*1 : A check sum can be added in case of RS-232C.
*2 : You can select [CR] or [CR+LF] for a delimiter in case of RS-232C. [CR] is fixed in case of Ethernet.
Reference
• The laser marker recognizes the data from the start code (STX) to the delimiter (CR or CR+LF) as one command data.
If there exists an unnecessary character string before the start code or after the delimiter, it is ignored (neither an
abnormal response data is returned).
• When using the external device set by 2-byte, NUL (00 (HEX)) can be used.
• Add to NUL before STX or after delimiter.
28
Command Sub command
Single character
Description
A start code is a code to identify the data head. STX: 02 (HEX) fixed.
A command is specified with three characters. Refer to "3 Communication Command and
Function" (P.34)
A sub command is an instruction of setting/readout complementary added to a command.
Specifies one of the characters below.
"S": Data setting or operation (Set)
"R": Readout of setting data (Read)
(Note) "S" or "R" cannot be selected for some commands.
Data specified per command
The content to be specified varies per command. Refer to "3 Communication Command and
Function" (P.34)
Check sum indicates the lower 1-byte of adding result of value (binary) from the start code
to the last data by converting it to two characters by ASCII code.
Where the command is "ABC", sub command is "S" and data is "000"
02(HEX)+41(HEX)+42(HEX)+43(HEX)+53(HEX)+30(HEX)+30(HEX)+30(HEX)=1AB(HEX)
AB(HEX), the lower 1-byte of 1AB(HEX) is converted to 41(HEX)+42(HEX) to two
characters by ASCII code.
ON/OFF of check sum can be selected on the environment setting of laser marker.
Refer to Operation Manual for the details.
Delimiter is a code to identify the end of data.
CR+LF (0D (HEX) 0A (HEX)) or CR(0D (HEX)).
Selects CR+LF or CR on the console. Refer to Operation Manual for the details.
Data
Variable length
ME-LPMSZ-SR-9
Delimiter
Check sum
Two characters/
Two characters
Single character
End