Free Key Operation; Free Key Mode Flowchart - IBM 5251 Series Maintenance Information Manual

205
FREE KEY OPERATION
The display station is in the free key mode after the
power-on diagnostic has been completed and before
the customer signs on. While in the free key mode, the
display station communicates with the controller and
permits keyed characters to be displayed; because
keyed characters are displayed you can check the
alphameric keys and most of the function keys. If the
following function keys are pressed while the display
station is in the free key mode, error code 0099 will be
returned:
Print
Help
Rollt (Up)
Roll4- (Down)
Enter / Record Advance
Test Request
Attention
Command function
keys 1 through 24
Use the online tests (206) to check these key
operations.
Free Key Mode Flowchart
Cursor is in
position E.
204·205
System Available
indicator is on.
~
Line Sync
o
Line Check
o
Internal Check
o
Storage Check
• Ready
Controller and dispiay
station polling complete
1·112