NCR 7156, Owner'S Manual

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7156 Owner’s Guide Chapter 5: Communication
September 1997 53
3 Drawer 1 Status Switch Drawer 2 Status Switch
4 +24 Volts (to So) +24 Volts (to So)
5 Drawer 2 Solenoid (Optional by
jumper: J13-1 to J14-1) Drawer 2 Solenoid
6 Ground (Status Switch Return) Ground (Status Switch Return)
Switch Settings
The DIP switches are located on the PC board behind the front cover as shown in the
illustration in “Setting Switches” in chapter 2. They are used to set the RS-232C parameters
as shown in the following illustration and table. These parameters must match those of the
host computer in order for the host computer and the printer to communicate.
Note: The switches can also be used for setting other functions and tests. Be careful when
setting the switches for the RS-232C settings 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
Use a paper clip or other pointed object to set the switches.
1. Open the front cover.
2. Set the switches to the desired settings shown in the table.
Switch 1 must be set to Off when setting switches for the RS-232C settings. This puts
the printer in the on-line mode where it can communicate with the host computer.
Caution: Do not set switch 1 to On. Setting switch 1 to On puts the printer in level 1
diagnostics (setup mode) where other functions and tests can be changed.
3. Close the cover.
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