The FLASH-MODE (cf 
page )
applies only to CAM01 with the SW channel. When it is selected, the
observations are performed in a fixed sequence lasting 20 minutes
at each pointing (whether a single pointing or each point inside of a
raster) split in 10 minutes on the sky in the selected configuration
of the camera, and 10 minutes on the reference dark.
This procedure allows to detect in 20 minutes fluxes of the order of 20 mJy with a S/N ratio of 3, but the photometric accuracy of this mode is expected to be low.
Input 
is irrelevant here, 
must be set to 30, and 
to 20s.