Response Data - Panasonic LP-400 Series External Control Manual

3-5-2 Response data

Response data is data which is returned from the laser marker for the command sent by an external device and consists of
the following three types.
1. Response data for normal receiving
The data starts with the start code "ACK". It returns when the command transmitted is normal or the command
processing has been completed normally.
2. Response data for abnormal receiving
The data starts with the start code "NAK". It returns when the command transmitted is abnormal or the command
processing has been completed abnormally.
3. Readout data
The data starts with the start code "STX". It returns when the command transmitted is normal and the sub
command is specified to "R".
⿎ Response data format for normal receiving
Start code Response code
Single character Two characters
Head
Code
Start code
Response code
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.
Check sum
Two characters
Description
ACK (code: 06(HEX)) fixed. A start code is a code to identify the data head and to indicate
that the data is a response data for normal receiving.
Two characters "00" is returned if the start code is ACK.
Check sum indicates the lower 1-byte of adding result of value (binary) from the start code
to the response code by converting it to two characters by ASCII code.
Ex. 06(HEX)+30(HEX)+30(HEX)=66(HEX)
66(HEX) is converted to 36(HEX)+36(HEX), to two characters by ASCII code.
ON/OFF of check sum can be selected on the environment setting of laser marker.
Refer to the Operation/Maintenance 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 the Operation/Maintenance Manual for the
details.
ME-LP400V-EX-6
Delimiter
Two characters/
single character
End
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