Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 66)

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Features
Macros
GPI Outputs and Events
A GPI output port can be used as an output to signal any external device according to the occur-
rence of an event within the Imagestore 750. The active status (on) is defined by the output
being internally pulled to ground.
To configure the events that trigger GPI outputs on or off, use the Imagestore 750’s front panel:
1 Select the GPI Output (ON or OFF) to configure:
2 Select Setup > GPI > GPI Outputs. Then choose GPI Out x On or GPI Out
x Off, where “x” represents the GPI number from 0 to 15.
3 If the GPI is unused, the display shows ‘ > None < ’.
4 Use the joystick arrows [  ] and [  ] to select the event to control the GPI output port.
Events triggers can be set to a number of different good and bad states relating to:
• External reference signal.
• SDI video inputs.
• Temperature.
• Voltages.
• Power supplies.
• Fans.
• Slave connection.
• Router connection (if IS-750-Master-Control option is enabled).
• Network interface.
• Disk usage.
• A/B mixer.
• DSK fader position and fade-to-black position.
• DSK timers.
• Store loading.
• DVE modes, playing or stopped.
• EAS running or stopped.
• Audio mixing, fade to silence, voice-overs, and follow FTB setting.
• Audio loss or type change (embedded or external AES).
 Note: Appendix B presents a full list of event types.
You can also set GPI outputs on or off using the Operate > GPI Output front panel menu.
Automation can set GPI outputs too.
The GPI output events defined for the Imagestore 750 are stored in / home/params/gpi.xml .
Macros
The GPI macros, introduced in General Purpose Interface (GPI) on page 47, are directly associ-
ated with the GPI connections and limited to a maximum of 32 macros (or fewer, when GPI
outputs are defined).
GPI macros are also difficult to compose and are limited to actions that can be selected from the
front panel’s ‘Operate’ menu. You can find a more versatile, extensible, and user-friendly way of