Remote Control Of The Touch Panel Controller; Understanding Ascii Message Formats; Message Components And Structure; The 3 Message Formats - Christie CP2000 User Manual

3.6 Remote Control
of the
Touch Panel
Controller
Understanding ASCII 
Message Formats
Message Components 
And Structure
LIT MAN USR CP2000
020-100032-04 Rev. 1 (03/14)
•
COMMUNICATION ERRORS
It is also recommended that the following additional conditions always be set to
trigger an alarm window (default). Select these triggers in the Advanced Preferences
TPC menu:
•
OVER TEMPERATURE
DMDs, integrator, prism or SSM has exceeded the operating specification.
•
FAN SPEEDS
—caused when a main intake fan, card cage fan, or the laminar air
flow device fan fails or is too slow.
•
LAMP EXPIRY
—appears when lamp has reached the end of its life (as defined in
the Lamp Limit setting).
IMPORTANT: For normal operation, do not disable alarm triggers.
Most TPC projector functions can be controlled remotely, typically at a controller,
via simple bi-directional ASCII messaging on an Ethernet communication link.
WHAT SETUP IS NEEDED?
controller, you must open an Ethernet socket between your controller and the valid
TPC address. See complete instructions in Setup and Shutdown later in this section.
Note that only one "physical" connection is permitted at any given time, and access
to remote functions may be limited by the installer. Do not use an RS-232 (serial)
link.
All "remote control" information passes in and out of the TPC as simple messages
consisting of command code and any data related to it. Such messages can be a
command to set a projector parameter at a specific level, such as changing to a
certain channel. Or the controller can request information, such as what channel is
currently in use—the projector then returns the data in a reply message. Regardless of
message type or origin, all messages use the same basic format and code as shown in
Figure 3.34. Where applicable, a message can expand to include additional
parameters of related data.
Figure 3.15. The 3 Message Formats
START AND END OF MESSAGE:
with the ")" character. Note that if the start character is received before an end
character of the previous message, the partial (previous) message is discarded.
FUNCTION CODE:
The function you wish to work with, such as channel switching or
picture mute, 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.
2
—SSM and/or I C links may be malfunctioning.
—caused when the temperature in the card cage, red/blue
To control these TPC functions remotely via your own
(SHADED MESSAGE IS FROM PROJ.)
Every message begins with the "("character and ends
BASIC OPERATION
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