Communication

Setting Switches

The DIP switches are located at the rear of the printer as shown in the illustration. They are used to set the communication parameters as outlined in the table. These parameters must match those of the host computer in order for the host computer and the printer to communicate.

Note: The switches are also used for setting other functions and tests. Be careful not to accidentally change the settings for the other functions. For more information, see “Level 1 Diagnostics” in section 3.

Use a straightened paper clip or other pointed object to set the switches.

1.Turn the printer to the back to access the DIP switches.

2.Set the switches to the settings you want, using the options in the tables below.

There is one table for RS-232C interface settings and one for parallel interface settings.

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. Set switch 1 to Off when setting switches for the interface settings. This puts the printer in the Online mode so it can communicate with the host computer.

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Unisys EFP9800 manual Setting Switches