NCR 7156, Service Manual

Page: 186 / 206

Appendix B: Communication Information 7156 Service Guide
September 1998 172
DIP Switch Settings
The DIP switches are located on the PC board behind the front cover. They are used to set
the RS-232C parameters and LCSIO (RS-485) address bits as shown in the following tables.
Note: The switches can also be used for setting other functions and tests. Be careful when
setting the switches that you do not accidentally change the settings for the other functions
and tests. See “Level 1 Diagnostics” earlier in this book for more information.
Off
Switch 1 is shown
in the OFF position
On
DIP Switch
RS-232C Switch Settings
DIP Switch Settings for RS-232C Parameters
Switch Settings Description
1 OFF
ON On-line Mode (default)
Level 1 Diagnostics (setup mode)
2 OFF
ON DTR/DSR Protocol (default)
XON/XOFF Protocol
3 OFF
ON Without Parity (default)
With Parity
4* OFF
ON Odd Parity
Even Parity
5, 6 5
OFF
ON
OFF
ON 6
OFF
OFF
ON
ON
19,200 Baud
9600 Baud (default)
4800 Baud
1200 Baud
*Switch 4 is not used if the parity is disabled (switch 3 set to OFF).