Hitachi CP-X809W When authentication error occurred, Protocol, Header, Lhg, Data Length

Command Control via the Network (continued)

Decreasing the projector setting value (Decrement command) 7KH3&VHQGVWKHIROORZLQJGHFUHPHQWFRGHWRWKHSURMHFWRU

Header + Command data (‘05H’ + ‘00H’ + type (2 bytes) + ‘00H’ + ‘00H’) 7KHSURMHFWRUGHFUHDVHVWKHVHWWLQJYDOXHRQWKHDERYHVHWWLQJFRGH 7KHSURMHFWRUUHWXUQVWKHUHVSRQVHFRGH‘06H’WRWKH3&

When the projector cannot understand the received command :KHQWKHSURMHFWRUFDQQRWXQGHUVWDQGWKHUHFHLYHGFRPPDQGWKHHUURUFRGH‘15H’ LVVHQWEDFNWRWKH3& 6RPHWLPHVWKHSURMHFWRUFDQQRWSURSHUO\UHFHLYHWKHFRPPDQG,QVXFKDFDVH WKHFRPPDQGLVQRWH[HFXWHGDQGWKHHUURUFRGH‘15H’ LVVHQWEDFNWRWKH3&,I WKLVHUURUFRGHLVUHWXUQHGVHQGWKHVDPHFRPPDQGDJDLQ

When the projector cannot execute the received command. :KHQWKHSURMHFWRUFDQQRWH[HFXWHWKHUHFHLYHGFRPPDQGWKHHUURUFRGH‘1CH’ + ‘xxxxH’LVVHQWEDFNWRWKH3&

:KHQ WKH GDWD OHQJWK LV JUHDWHU WKDQ LQGLFDWHG E\ WKH GDWD OHQJWK FRGH WKH SURMHFWRULJQRUHWKHH[FHVVGDWDFRGH&RQYHUVHO\ZKHQWKHGDWDOHQJWKLVVKRUWHU WKDQLQGLFDWHGE\WKHGDWDOHQJWKFRGHDQHUURUFRGHZLOOEHUHWXUQHGWRWKH3&

When authentication error occurred.

:KHQDXWKHQWLFDWLRQHUURURFFXUUHGWKHHUURUFRGHWKH‘1FH’ + ‘0400H’ is sent EDFNWRWKH3&

NOTE ‡ 2SHUDWLRQ FDQQRW EH JXDUDQWHHG ZKHQ WKH SURMHFWRU UHFHLYHV DQ XQGH¿QHGFRPPDQGRUGDWD ‡3URYLGHDQLQWHUYDORIDWOHDVWPVEHWZHHQWKHUHVSRQVHFRGHDQGDQ\RWKHUFRGH ‡&RPPDQGVDUHQRWDFFHSWHGGXULQJZDUPXS

[TCP #9715]

1.Protocol

&RQVLVWRIKHDGHUE\WHGDWDOHQJWKE\WHFRPPDQGGDWDE\WHV

FKHFNVXPE\WHVFRQQHFWLRQ,'E\WH

2.Header

)L[HG

3.Data Length

1HWZRUNFRQWUROFRPPDQGVE\WHOHQJWK')L[HG

4.Command data

1HWZRUNFRQWUROFRPPDQGVWKDWVWDUWZLWK%(()E\WHV

5.Check Sum

7KLVLVWKHYDOXHWRPDNH]HURRQWKHDGGLWLRQRIWKHORZHUELWVIURPWKHKHDGHU

WRWKHFKHFNVXP

6.Connection ID

5DQGRPYDOXHIURPWR7KLVYDOXHLVDWWDFKHGWRWKHUHSO\GDWD

11