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HP289
4.1.3 Communication Protocol
The RS232/422/485 option has a real time clock and enables the time
and date to be set and printed on tickets. The date format can be
European (days/months/years) or USA (months/days/years) while the
time is on a 24 hour clock.
Note that the clock will only retain its time for 3 days (minimum) if
there is no power connected to the instrument. After this period, the
clock may need to be reset.
The baud rate, parity, and word length can be selected during
configuration and the user must ensure that these correspond to the
setting on the printer or computer with which the instrument is
communicating.
The software protocols can be selected during configuration to provide
standard interfaces to a number of printers and computers. Since other
interfaces will continue to be added, the user should consult the factory
for the latest protocols and/or printer drivers.
Printer
A ticket is printed each time the RESET key is pressed. The instrument
prints the ticket before resetting the resettable total. Protocols are
provided to drive the following printers:
1 Standard Computer Printer (Note that the printer must have an
RS232 Serial Interface)
2 EPSON CTM290 Slip Printer
3 Contrec Model 624
4 EPSON TM290-2 Slip Printer
5 Contrec Model 632-2
6 Syntest SP-210
Consult with the factory if any other printer is to be interfaced with the
instrument.
The tickets can also be printed with a number of different units of
measure including liters and gallons. The units of measure are
selectable from a pre-programmed list.
A CTS input is provided and prevents the instrument from transmitting
any further characters to a printer if the printer buffer is full. The CTS