<JLIP technical information>
Data style of transmit and receive
JLIP device always transmit and receive 11 bytes data.
Command frame
It is a data sequence that contains control operation command from master controller like
PC to slave device like VCR.
It consists of the explanation below.
Header (2 bytes) : 0xFF + 0xFF
ID (1 byte) : one of number from 1 to 99 , or 127
Command body(7 bytes) : command operation code and parameters (*1)
Check sum (1 byte) : complement of the sum of other ten bytes of command
frame data (*2)
*1: refer to another document
*2: maximum bit is always 0 -- method of calculation is below.
Return frame
It is a data sequence that contains result of command operation from from slave device
like VCR to master controller like PC.
It consists of the explanation below.
Header (2 bytes) : 0xFC + 0xFF
ID (1 byte) : one of number from 1 to 99
Return body(7 bytes) : result or information of command operation (*3)
Check sum (1 byte) : complement of the sum of other ten bytes of command
frame data (*4)
*3: refer to another document
*4: maximum bit is always 0 -- method of calculation is below.
The first byte of 7 bytes-'Return body' is called 'command status', and it is for checking
command acceptance. (*3)
A maximum bit of every data except header data is always zero in JLIP.
Check sum data
A method of calculate check sum is like this.
r1 = (1st)+(2nd)+(3rd)+(4th)+(5th)+(6th)+(7th)+(8th)+(9th)+(10th)
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JLIP control system developer
7/11/2003
http://www.jvc-victor.co.jp/english/tech/jlip/techinfo_f/techinfo_f1/datastyle.html
MV8300P RS-232c Protocol Manual
