Christie DLV1280 DX User Manual page 28

Back-up or "Split" Networks
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In a typical network, broadcast serial communications or messages destined for a
specific projector travel through all serial ports in each projector regardless of
whether the messages originate from an RS-232 or RS-422 source (refer back to
Figure 2.26, bottom example). The communication path depends on the serial cabling
connected at each projector.
You may prefer the option of two separate communication paths—RS-232 or RS-
422—in your network, essentially creating a redundant "back-up" communication
path that can take over should a failed projector (or controller) prevent
communications via the other path. For this setup, connect each projector to the next
using both RS-232 and RS-422 ports.
Then enable the "Split Network"
setting in the Communications menu
for each projector present so that RS-
232 communications remain on RS-
232 paths only and RS-422
communications remain on RS-422
paths only (Figure 2.27). Each
projector can then receive and send
either type of message depending on
which controller initiates the
commands—should one path fail, the second "back-up" network path can be used.
Only one network should be active at a given time, as determined by the controller
(whether it is RS-232 or RS-422). Note that the "Broadcast Key" option is OFF.
Whenever downloading new projector software to networks, use a
single-route network only. DISCONNECT any redundant serial cabling
and UNCHECK the "Split Network" checkbox for each projector.
Two Different "Splits"
There are two different split network configurations possible (Figure 2.28). Set up
whichever option best suits your application needs:
A.
SPLIT NETWORK WITH ONE CONTROLLER–
want a back-up serial link, connect one controller standard (e.g., RS-232) to
one physical end of the network and the other controller standard (e.g., RS-
422) at the other physical end of the network. Make sure the "Split Network"
option is enabled in the Communications menu. If a projector should then fail
anywhere in the network, communication with the remaining projectors can be
resumed in the opposite direction using the other standard. NOTE: This
configuration requires that both standards be available from a single
controller, or that you use an RS-232/RS-422 adapter.
B.
SPLIT NETWORK WITH TWO CONTROLLERS–
RS-232 and one RS-422) and want one to be a back-up, connect each
controller to the appropriate port on the first projector in the network. Then
connect projectors together using both RS-232 and RS-422 ports as shown.
Make sure the "Split Network" option is enabled in the Communications
menu. Now, if either controller fails, you can simply switch to the other
controller and communicate via the other standard.
Figure 2.27. Enable "Split Network"
IMPORTANT
If you have a single controller and
If you have two controllers (one
DLV1280 DX User's Manual
INSTALLATION & SETUP
2-25