Christie LW751i User's Manual And Operating Manual page 17

RS-232C Communication (continued)
3. Response code / Error code
(1) ACK reply: 06h
(2) NAK reply: 15h
(3) Error reply: 1Ch + 0000h
(4) Data reply: 1Dh + xxxxh
NOTE
command or data.
LWU701i/LW751i/LX801i/LWU601i/LW651i 020-000789-02
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User's Manual - Technical LIT MAN USR D2 TECH GUIDE