NCR RealPOS 7197 Printer Migration Guide
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The NCR OPOS Service Object does not allow the application to
write to user-defined memory resident now on the 7197 printer.
This means a customer eyeing the availability of 64KB of space on
the printer for enhancements such as printer-resident electronic
journal can not take advantage of this feature using NCR OPOS.
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The NCR OPOS Service Object only supports two printer-resident
logos (graphic bit-images). Another 64 KB is provided to store
multiple logos downloaded from the application, but the 7197
OPOS driver is only able to manage two logos stored at the printer.
If a customer plans to continue using their current release of the NCR
OPOS Service Object, the 7197 printer should be configured in 7193
Emulation Mode depending on the NCR OPOS profile they have
specified. If the application is to be modified to take advantage of the
7197 features in 7197 Native Mode (supported by the NCR OPOS 2.2
Service Object or higher), the latest version of NCR OPOS should be
installed and the 7197 should be selected as the printer type
Note on Performance
The 7197’s improved performance is a function of a faster thermal print
mechanism, how the application and driver sends data to the printer,
and the speed of communication. The 7197 is capable of printing text at
up to 50 lines per second, thirty percent faster than the 7194 and more
than 10 times faster than most impact printers. Older applications
originally developed for slower impact printers often send information
to the printer line-by-line. On slower printers, waiting until the end of
the transaction before starting to print the receipt would have added a
significant amount of time to the length of the transaction. Faster
thermal printers can now produce the same receipt in seconds
(adjustments to the NCR OPOS Asyncblock Parameter maybe required
to achieve maximum print speed).
When printing line-by-line on faster thermal printers, the baud rate of
the communication interface can become a bottleneck, resulting in a
pause between lines. The repeated stop-and-go motion of the printer
mechanism that results may be both audible and apparent as
"jerkiness" of the printer.
