3M X31 - Page 116

3M™ Digital Projector X31/X36/X46
© 3M 2010. All Rights Reserved.
14
2.
Response code / Error code
KVKRZVKH[DGHFLPDO
7KHFRQQHFWLRQ,'LVDWWDFKHGIRUWKH7&3VUHVSRQVHHUURUFRGHVDUH
XVHG7KHFRQQHFWLRQ,'LVVDPHDVWKHVHQGLQJFRPPDQGIRUPDW
(1) ACK reply : 06h + ××h (îîKFRQQHFWLRQ,')
(2) NAK reoly : 15h + ××h
(3) Error reply : 1Ch + 0000h + ××h
(4) Data reply : 1Dh + xxxxh + ××h
(5) Authentication error reply : 1Fh + 0400h + ××h
(6) Projector busy reply: 1Fh + ××××h + ××h
:KHQWKHSURMHFWRULVWRREXV\WRUHFHLYHVWKHFRPPDQGWKHSURMHFWRU
returens the error code.
In such a case, check the sending code and send the same command again.
Automatic Connection Break
7KH7&3FRQQHFWLRQZLOOEHDXWRPDWLFDOO\GLVFRQQHFWHGDIWHUWKHUHLVQR
communication for 30 seconds after being established.
Authentication
7KHSURMHFWRUGRHVQRWDFFHSWFRPPDQGVZLWKRXWDXWKHQWLFDWLRQVXFFHVV
ZKHQDXWKHQWLFDWLRQLVHQDEOHG7KHSURMHFWRUXVHVDFKDOOHQJHUHVSRQVHW\SH
DXWKHQWLFDWLRQZLWKDQ0'0HVVDJH'LJHVWDOJRULWKP:KHQWKHSURMHFWRULV
XVLQJD/$1DUDQGRPE\WHVZLOOEHUHWXUQHGLIDXWKHQWLFDWLRQLVHQDEOHG%LQG
this received 8 bytes and the authentication password and digest this data with
WKH0'DOJRULWKPDQGDGGWKLVLQIURQWRIWKHFRPPDQGVWRVHQG
)ROORZLQJLVDVDPSOHLIWKHDXWKHQWLFDWLRQSDVVZRUGLVVHWWR³SDVVZRUG´DQGWKH
UDQGRPE\WHVDUH³DIF´
1) 6HOHFWWKHSURMHFWRU
 5HFHLYHWKHUDQGRPE\WHV³DIF´IURPWKHSURMHFWRU
 %LQGWKHUDQGRPE\WHV³DIF´DQGWKHDXWKHQWLFDWLRQSDVVZRUG
³SDVVZRUG´DQGLWEHFRPHV³DIFSDVVZRUG´
 'LJHVWWKLVELQG³DIFSDVVZRUG´ZLWK0'DOJRULWKP
 ,WZLOOEH³HGDGIIDEFHIGEGH´
 $GGWKLV³HGDGIIDEFHIGEGH´LQIURQWRIWKHFRPPDQGVDQG
send the data.
 6HQG³HGDGIIDEFHIGEGH´FRPPDQG
 :KHQWKHVHQGLQJGDWDLVFRUUHFWWKHFRPPDQGZLOOEHSHUIRUPHGDQGWKH
UHSO\GDWDZLOOEHUHWXUQHG2WKHUZLVHDQDXWKHQWLFDWLRQHUURUZLOOEHUHWXUQHG
NOTE$VIRUWKHWUDQVPLVVLRQRIWKHVHFRQGRUVXEVHTXHQWFRPPDQGV
the authentication data can be omitted when the same connection.
Command Control via the Network (continued)