Film-Tech Forum ARCHIVE: Barco Alchemy (GPO)

This is topic Barco Alchemy (GPO) in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Sergii Mykhailenko (Member # 8870) on 04-11-2016, 06:48 AM:

Hello everyone!!!

Alchemy server has 8 gpo. At projector startup all this relays are closed. And after projector's booting relays are open.

I connected dimmer control direct to GPO. Every morning at projector's start up I can see in the auditorium that light turn on or turn off rundom.

I want that all GPO will be open during projector's booting.

Is it posible?

Sorry for my eng.

Posted by Carsten Kurz (Member # 5396) on 04-11-2016, 08:39 AM:

There is an INFO-T 1188 from Barco.

----start excerpt ----
GPIO and projector Sleep mode
In case the projector is equipped with a “Sleep” mode (e.g. DP2K S series): Enter or leave Sleep mode can be done with GPIO of the Cinema Controller via two predefined Macros (not editable). Not with the GPIO of the ICMP.
The GPO signals of the ICMP will return to their default output level when the projector is switched to Sleep mode. This could generate unexpected "Falling Edge" triggers at the output pins. Also when awakening the projector (from Sleep mode to Standby mode) the GPO signals of the ICMP may generate unexpected "Rising Edge" events.
GPO and projector switching On or Off
The GPO signals of the Cinema Controller and ICMP will return to their default output level when the projector is switched to power-off. This could generate unexpected "Falling Edge" triggers at the output pins. Also during power-on the GPO signals may generate unexpected "Rising Edge" events.
----- end excerpt ------

You may need to add another inverting switching stage or switch to NC/NO changeover relays, add a relay-enable function etc. to make this work as you want it.

- Carsten