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• SYS REQ (System Request)OP3
You can use the SYS REQ function to switch from communication with your
application program to communication with the host control program. SYS
REQ causes the screen to be cleared.
You can log off your application program using the SYS REQ function. Enter
the SYS REQ key sequence to communicate with the host control program, then
enter the logoff command.
See "Communicating with the Host Control Program" on page 2-18 for a
description of how your terminal operates when you
are
communicating with the
host control program.
• DEV CNCL (Device Cancel)
If your keyboard is locked because of a "printer busy" condition (X PRTBSY
on the status line), and you wish to cancel your print request, you should use the
DEV CNCL function.
Using the DEV CNCL function during a IDENT operation causes the operation
to end. The previous printer ID is displayed on the status line.
Once the printing has begun, the DEV CNCL function has no effect.
• CURSR SEL
(Cursor
Select)OP4
This function allows the selector-light-pen-detection function to be performed
from the keyboard. See "Using Light Pen Emulation" on page 2-19 for a
description of how this function is used .
• ATTNOP4
The ATTN function is used to signal an attention condition to the host.
Using ATTN during a print IDENT operation causes the ID operation to end.
The keyboard locks, and the previous printer ID and the "function not
supported" message (X -F) are displayed on the status line. To unlock the
keyboard, press the Reset Key sequence defined for your terminal and reposition
the cursor.
• Print
The Print function causes the current screen to be printed. See "Printing Screen
Images (Local Copy)" on page 2-20.
• IDENT
The IDENT function is used to assign the printer or the printclass to be used
when a local copy function is initiated. See "Printing Screen Images (Local
Copy)" on page 2-20.
OP4
Operational Note: The following 3270 functions cannot be used when operating as the 3708 control terminal: Erase
EOF, Erase Input, DUP, FM, PA keys, Clear, CURSR SEL, ATTN, SYS REQ and Delete.
Chapter 2. Operating in Full-Screen Mode
2-9
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