Yamaha MMP1 Operation Manual page 36

4-1-8i. Global tab/GPI
GPI In
Set the Function and the Trigger for GPI [INPUT]
connector pins 1-16 on the MMP1 unit. The following four
Trigger types are available.
High
Executes the Function when the input voltage
is High.
Low Executes the Function when the input voltage
is Low.
On Edge Executes the Function when the input voltage
changes from Low to High.
Off Edge Executes the Function when the input voltage
changes from High to Low.
GPI Out
Set the Function and the Behavior for GPI [OUTPUT]
connector pins 1-10 on the MMP1 unit The following three
Behavior types are available.
Make Connects contacts within the MMP1. The
voltage of the GPI device at the connection
destination becomes Low.
Break Opens contacts within the MMP1. The
voltage of the GPI device at the connection
destination becomes High.
Pulse Changes the voltage from Low to High, and
then reverts back to the Low state after
maintaining a High voltage for around 250
ms.
4. Screens
MMP1 Operation Manual 36