GBC FusionPunch II Service Manual page 349

Principles of Operation
DFA (continued)
S3 Sheet Acknowledge Signal (Sheet Delivered Signal)
This is a 5 VDC signal that is sent to the printer from the finisher. This
signal is normally Low (Off) and active High (ON). When the finisher
receives the C0 signal (Sheet Exit Signal explained above) from the
printer, the finisher has a specified amount of time to return the signal to
the printer. The time allotted for this signal to be returned is specified by
the finishing device's personality profile. The signal returned to the
printer is known as the S3 signal (Sheet Acknowledge Signal). This sig-
nal is used to track the sheets through a finishing device for Error
Recovery. The printer will send the C0 signal to a finishing device on
every sheet of paper as the lead edge covers the last sensor in the printer.
When the finisher receives the C0 signal, it will then know that a sheet
of paper is about to enter the finishing device. Then the finisher will
track the signal and the sheet of paper associated with it through the
entire finisher. Once the C0 signal and the sheet of paper associated
with it have been processed, the finisher will then send the S3 signal
back to the printer. When the printer receives the S3 signal from the fin-
isher, it then knows that the finisher has completely processed that sheet
of paper. It will therefore not reprint that sheet of paper if the printer or
the finisher detects a jam.
GBC FusionPunch II Service Manual
S4 Set Acknowledge Signal (Set Delivered Signal)
This is a 5 VDC signal that is sent from a finishing device to the printer.
This signal is normally Low (Off) and active High (ON). It works much
like the S3 signal (Sheet Acknowledge Signal explained above), except
that it only applies to the last sheet of paper in every set. Currently the
FusionPunch II does not use the S4 signal (Set Acknowledge Signal) as
an end Device. The FusionPunch II can support the S4 signal by routing
it to down-line finishers.
Note: The C0 and S3 signals are also sent back and forth on the last
sheet of every set. Therefore, the FusionPunch II does not need to use
the S4 signal for Error Recovery, as it is redundant. Also, the Fusion-
Punch II Personality Profile calls for Sheet Recovery. If the Profile
called for Set Recovery, then it would become necessary to use the S4
signal.
C2 Cycle Up Signal
This is a 5 VDC signal that is sent from the printer to the finisher. This
signal is normally High (Off) and active Low (ON). This signal is used
by the FusionPunch II to know when to turn ON components required
for Online Operation. It is also used to know when to turn OFF compo-
nents in a stopped condition. The C2 signal (Cycle Up Signal) is sent a
specified (specified by the Personality Profile) amount of time before
the printer sends a sheet of paper to the finisher. The C2 signal remains
ON (Low) until the Job is completed or until the printer or the finisher
detects a jam.
12/2003
6-77
Principles of Operation