Christie DWU675-E Manuel d'utilisateur télécharger pdf (Page 7)

E Series 675/775 Serial Commands Technical Reference Information 3 of 53

020-000576-01 Rev. 1 (10-2012)

when it has finished processing the message. Note that requesting an acknowledgement serves no purpose

when included in a request message, since the acknowledgement will be redundant to the actual reply from

the projector.

• FUNCTION CODE: The projector function you wish to work with, such as contrast, is represented by a

three-character ASCII code (A-Z, upper or lower case). This function code appears immediately after the

leading “(“that starts the message. In messages sent to the projector that do not have a subcode, a space

between the function code and the first parameter (or special character) is optional.

• +SUBCODE: The projector function you wish to work with may have one or more subcodes that will allow

you to select a specific source or subfunction. The subcode is represented by a four-character ASCII code

(A-Z, upper or lower case, and 0-9). This subcode appears immediately after the function code, with a “+”

character to separate the code and subcode. If there is no subcode, the “+” is also omitted. In messages sent to

the projector that do have a subcode, a space between the subcode and the first parameter (or special charac-

ter) is optional.

•REQUEST/REPLY SYMBOLS: If the controller is requesting information from the projector, a “?” ques-

tion mark appears directly after the function code. If the projector is replying, a “!” exclamation mark

appears directly after the function code. For set messages to the projector, neither of these characters appear

— data directly follows the code and subcode.

MESSAGE ERRORS

If a command cannot be performed (e.g. syntax error), you will receive a descriptive error indicating the

problem. For example: (ITP) - (65535 00000 ERR00005 "ITP: Too Few Parameters")

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Christie DWU675-E Manuel d'utilisateur Page 7