Sample Messages And Their Meaning; Special Characters For Text - Christie CP2000 User Manual

BASIC OPERATION
Sample Messages and 
Their Meaning
3-42
REQUEST/REPLY SYMBOL:
projector, a "?" question mark appears directly after the function code. If the
projector is replying, a "!" exclamation mark appears directly after the function code.
For set messages, neither of these characters appear—the code is followed by the
data itself (see next paragraph).
DATA:
The value for a given projector parameter, such as on or off, appears in ASCII-
decimal format directly after the request/reply symbol. Unless you add an optional
space after the symbol (i.e., before the data) in a set message, data immediately
follows the request/reply symbol without a space. Other details about data:
•
All values returned by the projector (reply messages) have a fixed length of
either 3 or 5 characters regardless of the actual value—the value is padded with
leading zeros as needed.
•
Data in set messages does not require padding.
•
For any given parameter, data length is always the same. E.g., the picture mute
value, which is either "on" (1) or "off" (0) is always 3-digits: 001 or 000.
•
Within one message, multiple parameters of data must be separated by one
"space" character.
•
Data pertaining to a specific source other than the current source is preceded by:
the letter "S", the source number (i.e., channel), and a space. This is similar to an
"extra" parameter P0.
•
Text parameters such as channel names are enclosed in double quotes following
the data, as in "Name".
TEXT PARAMETERS:
Most data is simply a numerical value, however some messages
also require text. For example, a channel naming message typically includes a text-
based name after the channel number—enclose this text in double quotation marks,
as in "Tilt the Wagon". Use all characters as desired except for the following special
characters—these require a 2-character combination as shown:
Table 3.12. Special Characters for Text
If you want this... Enter this...
\
"
(
)
0x0A
0x1B
Desired Action
Get current Chan#
Chan# reply from proj.
Set Chan#
Get picture mute status
Picture mute reply from proj.
Set picture mute
If the controller is requesting information from the
Description
\\ Backslash
\" Quote
\( Left bracket
\) Right bracket
\n New line - if the text can be displayed on more than
one line, this will cause the next character to be
displayed at the start of the line that follows the
current one.
\x control code (ESC)
Table 3.13. Sample Messages
Message Description
(CHA?) Request by controller for current channel #
(CHA!101) Reply from proj. that current channel is 101
(CHA 101) Switch to the first channel on the TPC
(PMT?) Request by controller for picture mute status
(PMT!000) Reply from proj. that picture is mute is off.
(PMT 1) Turn the picture mute on (blank the image)
LIT MAN USR CP2000
020-100032-04 Rev. 1 (03/14)