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LDP-8242 User Manual (Iss. 03) Operating Instructions • 3–47
GPI Controls
Provides two independent GPI controls for GPI 1 and GPI 2 that invoke a
user-defined card presets upon receiving a contact closure/logic level on
the corresponding GPI input.
Note : After familiarizing yourself with the GPI controls described here, refer to the section “ Troubleshooting ” on page 3-51 for a
comprehensive example using these controls for multi-source audio routing.
GPI Status Displays Status displays for GPI 1 and GPI 2 indicate Open (and “unlit” indicator)
for GPI not present on GPI input. Display indicates Closed (and “lit”
indicator) when GPI is present.
Note : GPI trigger threshold/type is set using GPI Coding drop-down
described below. Refer to Specifications in Introduction, Chapter 1 for GPI
electrical specifications and limitations.
GPI Preset Number Go-To Select Individual drop-downs (one for each of the four GPI states monitored by
the card) allow invoking a card preset when the corresponding GPI state
is true.
• No Preset setting inhibits going to a preset if the state
corresponding to the drop-down becomes true. This setting is
typically used to inhibit GPI for an unused GPI.
• 1 thru 64 setting allows any of 64 user-defined presets to be
invoked when the state corresponding to the drop-down becomes
true.
Note : No Preset setting should be considered and used for any
logic state that is not specifically to be used for a valid GPI state.
GPI go-to number settings are independent of saved presets and
cannot be defined under a preset.
GPI Trigger Coding Selects GPI triggering as follows:
• Disabled : GPI conditions on both GPI ports are ignored; no preset
is invoked as a result of GPI status. Use this setting as a master
disable of GPI functions.
• Edge and Binary : See the description and examples below.
Note : Make certain GPI Trigger Coding is set to Disabled if GPI is not to
be used. Selecting Binary triggering without controlled GPI inputs
will result in inadvertently invoking a preset .
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