3M™ Digital Projector X31/X36/X46
© 3M 2010. All Rights Reserved.
14
2. Response code / Error code
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7KH FRQQHFWLRQ ,' LV DWWDFKHG IRU WKH7&3V UHVSRQVH HUURU FRGHV DUH
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(1) ACK reply : 06h + ××h
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)
(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
:KHQWKHSURMHFWRULVWRREXV\WRUHFHLYHVWKHFRPPDQGWKHSURMHFWRU
returens the error code.
In such a case, check the sending code and send the same command again.
Automatic Connection Break
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communication for 30 seconds after being established.
Authentication
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ZKHQ DXWKHQWLFDWLRQ LV HQDEOHG7KH SURMHFWRU XVHV D FKDOOHQJHUHVSRQVH W\SH
DXWKHQWLFDWLRQZLWKDQ0'0HVVDJH'LJHVWDOJRULWKP:KHQWKHSURMHFWRULV
XVLQJD/$1DUDQGRPE\WHVZLOOEHUHWXUQHGLIDXWKHQWLFDWLRQLVHQDEOHG%LQG
this received 8 bytes and the authentication password and digest this data with
WKH0'DOJRULWKPDQGDGGWKLVLQIURQWRIWKHFRPPDQGVWRVHQG
)ROORZLQJLVDVDPSOHLIWKHDXWKHQWLFDWLRQSDVVZRUGLVVHWWR³SDVVZRUG´DQGWKH
UDQGRPE\WHVDUH³DIF´
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6HOHFWWKHSURMHFWRU
5HFHLYHWKHUDQGRPE\WHV³DIF´IURPWKHSURMHFWRU
%LQG WKH UDQGRP E\WHV ³DIF´ DQG WKH DXWKHQWLFDWLRQ SDVVZRUG
³SDVVZRUG´DQGLWEHFRPHV³DIFSDVVZRUG´
'LJHVWWKLVELQG³DIFSDVVZRUG´ZLWK0'DOJRULWKP
,WZLOOEH³HGDGIIDEFHIGEGH´
$GGWKLV³HGDGIIDEFHIGEGH´LQIURQWRIWKHFRPPDQGVDQG
send the data.
6HQG³HGDGIIDEFHIGEGH´FRPPDQG
:KHQ WKH VHQGLQJ GDWD LV FRUUHFW WKH FRPPDQG ZLOO EH SHUIRUPHG DQG WKH
UHSO\GDWDZLOOEHUHWXUQHG2WKHUZLVHDQDXWKHQWLFDWLRQHUURUZLOOEHUHWXUQHG
NOTE
$VIRUWKHWUDQVPLVVLRQRIWKHVHFRQGRUVXEVHTXHQWFRPPDQGV
the authentication data can be omitted when the same connection.
Command Control via the Network (continued)