Program Mode; Unlocking The Program Mode; Locking The Program Mode; Entering Program Mode - IBM 6400 Setup Manual

Program Mode

The printer is in Program mode whenever the configuration menus and
option values are displayed on the operator panel message display. Program
mode is either locked or unlocked. In order to select new configuration
values, you must unlock Program mode. In order to prevent accidental
changing of the configuration settings, you may lock Program mode.

Unlocking the Program Mode

Program mode must be unlocked in order to use the operator panel to change
the configuration settings. When Program mode is unlocked, pressing the
Enter key selects configuration values as the active values, that is, places
them into printer NVRAM. An asterisk (*) after a displayed setting shows it
is entered into memory.
Press the Scroll + Scroll± keys at the same time to unlock Program mode.
The following message will appear briefly:

Locking the Program Mode

When Program mode is locked, you cannot use the operator panel to change
the configuration settings. However, you can still select the configuration
menus and view the current configuration settings.
Press the Scroll + Scroll± keys at the same time to lock Program mode.
The following message will appear briefly:

Entering Program Mode

To place the printer in Program mode, press the Menu key.
OPERATOR MENU
UNLOCKED
OPERATOR MENU
LOCKED
Chapter 3. Configuring the Printer 3–7