Ricoh D127 Service Manual page 368

System Service Mode
These SPs count the total number of large pages input with the scanner
for scan jobs only. Large size paper (A3/DLT) scanned for fax transmission
is not counted.

ADF Org Feeds
8 221
These SPs count the number of pages fed through the ADF for front and
back side scanning.
001 Front
002 Back

When 1 sheet is fed for duplex scanning the Front count is 1 and the Back count is 1.

If a jam occurs during the job, recovery processing is not counted to avoid double counting.
Also, the pages are not counted if the jam occurs before the first sheet is output.
D127/D128
These counters are displayed in the SMC Report, and in the User
Tools display.
CTL
Number of front sides fed for scanning:
With an ADF/ARDF that can scan both sides
simultaneously, the Front side count is the same as the
number of pages fed for either simplex or duplex scanning.
With an ADF/ARDF that cannot scan both sides
simultaneously, the Front side count is the same as the
number of pages fed for duplex front side scanning. (The
front side is determined by which side the user loads face
up.)
Number of rear sides fed for scanning:
With an ADF/ARDF that can scan both sides
simultaneously, the Back count is the same as the number
of pages fed for duplex scanning.
With an ADF/ARDF that cannot scan both sides
simultaneously, the Back count is the same as the number
of pages fed for duplex rear-side scanning.
[0 to 99999999 / 0 / 1]
3-112 SM Appendix