Quote Originally Posted by Trench117 View Post
Hi,

I have a v4 main and backup system programmed on presets, triggered by MSC. Currently both main and backup are outputting identical serial to the projectors at the same time. Once possibly twice I have had a missed shutter open cue on one of the units. I have heard this could be because of the dual serial output.

Any thoughts? Ideally would turn serial on and off as part of the main/backup switch.

T
How are you transmitting the RS232?
If over TCPIP, does the Serial server allow multiple client connections?
Is the serial command specifically OPEN with a separate command for CLOSE?
(some projectors use the same command to open and close - so you could see what might happen if you are sending 2 commands…)

(assuming TCPIP serial server)
Personally - I would only use ONE Mac at a time to send the command…

Probably test to see what happens if you send 2 commands at exactly the same time.
Are they ignored? received sequentially?
Only way of knowing is to test…

S