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)