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Terminal Control
Controlling the User Key Menu Programmatically
From a program executing on a host computer or from the keyboard in Block or Local mode,
the User Function Key Menu may be displayed and removed using the following escape
sequences.
DISPLAY MENU:
Ec
REMOVE MENU:
Ec
When removing the menu with Ec
k,
the function key labels are displayed and the user
function key definitions are enabled. The Ec
k
enables the function keys in this fashion only
when the definition menu was displayed. To programmatically enable the user programma-
ble function keys in other circumstances, the escape sequence Ec
"j B
must be used.
Triggering the User Keys Programmatically
From a program executing on a host computer, the execution of any of the function keys may
be triggered by using the following escape sequence:
Ec "
f
<number>E
where <number> identifies the key number to be triggered. The legal values are 1 to 8,
inclusive. This action is equivalent to depressing the function key without t h e . key, thus
triggering the user's definition; the shifted-function can not be triggered programmatically
as it serves no purpose.
When
cCT"
type function keys are triggered (or pressed), the data string is transmitted to the
computer as a data block, just as in Block mode. For information on handshaking and
block-terminating characters associated with transfer of the data block, refer to Section 9.
This escape sequence may also be used within a user key definition to effectively concatenate
two or more key definitions.
Programmable RETURN key
The
1:1
key is also programmable, however, this can be done only through the Terminal
Configuration menu and the key's definition is limited to that definition.
2-15
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