Sony DVS-9000 System User Manual page 727

Step execution (requires a Setup menu setting)
By selecting step execution mode in the Setup menu, you can make macro
execution pause every time an event is executed.
Take operation
When a paused macro is restarted, this is referred to as a "Take" operation.
Macro take operation using a GPI input
You can carry out a macro take operation using a GPI input on the control panel
and DCU.
For GPI input settings, see "Interfacing With External Devices (Device
Interface Menu" in Chapter 19 (Volume 3) and "GPI Input Setting (GPI Input
Assign Menu)" in Chapter 22 (Volume 3).
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Macros