ETC Congo Family v6.4.0 - Manual (Page 613)

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Percent times, or seconds?
Times for Moving Devices are set in seconds (absolute) or as a percentage of the IN time of
a Sequence Step.
The default setting is percent. This means that all FCB-Times will equal the IN time of a
Sequence Step, and all FCB-Delay Times will execute as a percentage of the IN time of a
Sequence Step.
NOTE
In all plays files earlier than 4.2, the FCB Delay time was set to 100%
due to the fact that Delay Times were inherited from the Delay In
time. These plays (pre-4.2) with FCB Delays set to 100% will be
converted to use a delay of 0s instead.
If the FCB Times are set to 50% of the IN-time they will be 2.5 seconds at an in time of 5
seconds.
If the In-time is changed to 10 seconds, the FCB-times will be 50% of 10 (= 5 seconds).