Siemens Simovert Masterdrives Compendium page 793

Technology Option F01
Operating mode 0
9.4.39 Referencing "on the fly" for synchronization [843]
9-102
The axis does not transport the printing index:
The drive being taken into consideration is normally arranged behind
the drive transporting the material with the printing index (and not itself
evaluating the printing index). If the printing index comes too late, the
drive must brake briefly in order to "wait" for the printing index.

You will find detailed information on position correction in the
"Synchronization functions" chapter of the Function Description
in manual /1/.
The referencing "on the fly" function enables synchronization to be
made "on the fly" during startup to a reference index (BERO or similar)
in synchronization mode.
It is no longer necessary to approach the reference index beforehand in
positioning mode and then to change over into synchronization mode
from standstill.
The function is enabled via a binector (U675.2). At a positive edge of
the enable signal, the output binector B808 "Referencing running" is
reset. As long as the enable is active (=1), new referencing takes place
with each recorded reference index. The index is recorded with the
"Start position correction" input (U666).
Usually the "Start position correction" input is always made when the
interrupt triggered by the reference index has resulted in a new valid
position measured value.
When the reference index has been recognized, both the position
actual value and the position setpoint are set to the reference position.
No compensation movement takes place.
Printing indices
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6SE7087-6QX70 (Version AN)
Compendium Motion Control
08.2012
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Siemens AG
SIMOVERT MASTERDRIVES