<JLIP technical information>

Return data Return data of the response against command is like this below. They are used in 11 bytes included ID number of controlled device and check sum data. Return data that are shown as 'xx' and other data in the table are specified in the  explanation below.

return data	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th
general return	0xfc	0xff	(ID)	xx	xx	xx	xx	xx	xx	xx	(sum)

Common part of return data The first data and the second of return data are always 0xfc and 0xff. (Their command data are always two 0xffs.) The ID number is the same of the device itself. The 4th data is called as 'command status'. Command status Command status is for indicating device operation against received command. These lower three bits(D2,D1,D0) mean these below. <cmd status : 1>(D2=0,D1=0,D0=1) It shows that the command is not implemented.(with no function against command) <cmd status : 3>(D2=0,D1=1,D0=1) It shows that the command is accepted and performed. (Even if it is already in the state of command performed before receiving command,  it regards the operation of the command as performed, and  the device returns the  status data as 3. (But some device return the status data as 5 at some command.)) <cmd status : 4>(D2=1,D1=0,D0=0) It shows that the command is accepted and currently performing. (It shows that the command is not performed completely at present time.) So if it is received this value, it needs to wait for the time. How long to wait is until D6 bit of this data being turned to zero. More precisely, when this value is 4, D6 bit is always one. And in this condition, it is possible to transmit the kind of command that is not operate device. And it needs only checking D6 bit until it turns zero. If D6 bit turns to zero, then next operation is possible to perform. (But, this D6 bit is not accurate in some device. In this case, it needs to wait for a proper time and perform next operation.)   <cmd status : 5>(D2=1,D1=0,D0=1) It shows that the command is not possible to perform as not in condition. In this case, it may be to display a error message to user, or to recover the operation properly.

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