Christie DHD800 Serial Communications Protocol-Extended

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PDG-DHT8000L Expand Serial Command Functional Specifications3. Notes for communication・ Expand Serial Command is defined as a single command per line that starts with “C” and ends withcarriage return (0x0D).・ When a projector receives carriage return (0x0D), it starts decoding.・ There are two types of commands as below:Example of Functional Execution Command:”CF_BRIGHT_032” [CR]Example of Status Read Command: “CR_BRIGHT” [CR]Note) “_” indicates a space・ It clears the information of buffer in the following cases:- when the projector receives LF (0x0A) or EOF (0x1A).- when it takes more than one second to receive a single command(Until receiving the carriage return after the reception of the first data)・ The projector processes the command and returns the response within a few ms to 8000 ms afterthe reception of the command. When several commands are sent in succession, do not sendanother command unless the response to the previous command has been returned. Need toconfirm that the processing of the current command has been completed and returned the responsebefore sending another command.CommandPC → Projector“CF_BRIGHT_032” [CR]Projector → PC “000” [CR]Command processing(A few ms – 8000 ms)ResponseNote) when the computer sends another command before the previous response has beenreturned, the projector may not operate properly.Note) when the current command processing has not completed, another command process cannot be accepted by the projector・ Normally it is less than 1000ms for the completion of receiving a command and returning theresponse, but it takes more than 1000ms for some Functional Execution Commands as listedbelow:CommandItemCF_IMAGESelect Image ModeCF_INPUTSelect InputCF_SCREEN Select Screen SizeCF_SYSTEM Select SystemCF_INPUT1Select Input 1 and Signal (concurrent execution)CF_INPUT2Select Input 2 and SignalCF_INPUT3Select Input 3 and SignalCF_INPUT4Select Input 4 and SignalCF_IMAGEADJ Reset/Store for Image Adjustment・ It takes about 8 seconds for internal initialization after plugging in AC power. During this time itcannot process commands. Do not issue any command.DHD800 RS232 Codes-Expand Technical Ref.020-000582-01 Rev. 1 (11-2012)11/101
PDG-DHT8000L Expand Serial Command Functional Specifications4. Notation・ Data from a controller to a projector is represented as COMMAND, and data from a projector to acontroller in response to the incoming command is represented as RESPONSE.・ [CR]: Carriage Return CodeThe command ends with carriage return code.The response also ends with carriage return code.・ _: Space CodeAll space code is indicated by (_).・ %1: Parameter included in commandWhen there is more than one parameter, they are represented as %2, %3…DHD800 RS232 Codes-Expand Technical Ref.020-000582-01 Rev. 1 (11-2012)12/101
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Christie DHD800 Serial Communications Protocol-Extended

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