7197 Series II Owner’s Manual
Chapter 5: Communication
August
2011
34
Char./Line Lines/Receipt Transmit Time: (9600 Baud) Transmit Time: (19.2 K Baud) Print Time
20
20
0.4 Seconds
0.2 Seconds
1.2 Seconds
20
40
0.8 Seconds
0.4 Seconds
2.4 Seconds
44
20
0.88 Seconds
0.44 Seconds
1.2 Seconds
44
40
1.76 Seconds
0.88 Seconds
2.4 Seconds
XON/XOFF Protocol
The XON/XOFF characters coordinate the information transfer between the printer and
the host computer. The printer sends an XON character when it is ready to receive data
and it sends an XOFF character when it cannot accept any more data. The software on the
host computer must monitor the communication link as shown in the following flowchart
in order to send data at the appropriate times.
If XON/XOFF has been selected, the printer also toggles the DTR signal, as described in
the next section, but it does not look at the DSR signal to transmit data.
XON character = Hex 11.
XOFF character = Hex 13.
DTR/DSR Protocol
The DTR signal is used to control data transmission to the printer. It is driven low when
the printer is ready to recieve data and driven high when it cannot accept any more data.
Data is transmitted from the printer after it confirms that the DSR signal is low.
Summary of Contents for 7197 II SERIES
Page 5: ...v EMC 100 240 1 5 0 8 50 60 24 2 3 3 125 NCR NCR EMC 360 NCR EMC A A...
Page 7: ...vii A NCR NCR NCR A...
Page 35: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 21 September 2011...
Page 37: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 23 September 2011...
Page 38: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 24 September 2011...
Page 253: ...7197 Series II Owner s Guide Appendix B Print Characteristics 228 Februrary 2012 Code Page 932...
Page 272: ...7197 Series II Owner s Guide Appendix B Print Characteristics 247 Februrary 2012...
