IBM 3270 Operator's Guide

Numeric Lock Feature
When installed on a 3278 Typewriter keyboard or Data Entry keyboard, the
.Numeric Lock feature limits the characters
that you can key into a field
designated by the program
as a Numeric field. This feature is provided as an
aid for operators who rarely look at the screen.
When the cursor enters a Numeric field
on your screen, your display station
automatically shifts to Downshift Mode
if you have a Typewriter keyboard (if
the Typewriter keyboard does not have the Numeric Lock feature, nothing
happens) or
to Upshift Mode if you have a Data Entry keyboard (with or with-
out the Numeric Lock feature installed). When this happens, if your keyboard
has the Numeric Lock feature installed,
(1) the Numeric ( NUt1 ) message
appears
in the Shifts and Modes portion of the Operator Information Area
and (2) the only keys
that you can key into the Numeric field are the digits 0
through 9, period ( . ), minus ( - ), and the DUP key. Pressing any other key
that can enter a displayable character turns
on the Do Not Enter - Numeric
Data
Only ()( *NUt1 ) message in the Operator Information Area and
disables
your keyboard (keyboard clicker either starts or stops clicking).
Therefore,
if you key a non-numeric character into a Numeric field, you will
realize
your error without looking at the screen. Pressing the RESET key
unlocks the keyboard and turns
off the Do Not Enter message.
Note:
The Numeric Lock feature can be installed on the Typewriter/APL and
Typewriter/Tex t key boards.
If you are using a Data Entry keyboard, you can override this feature and key
any
"locked out" character into the Numeric field. This is done by pressing the
Numeric
Shift ( 1} ) key or the Alpha ( .I} ) key, depending on the char-
acter to be keyed. For example, if a comma ( , ) must be keyed, press and hold
the Numeric
Shift key and then press the comma key. If an N must be keyed,
press and hold the Alpha key and
then press the N key. Using this method, you
can enter "locked out" characters without error.
If you are using a Typewriter keyboard, you can override this feature and key
any uppercase character or symbol into
the Numeric field. This is done by
pressing and holding the
Shift ( 11' ) key and then pressing the desired character/
symbol keyes).
Note:
The Shift Lock ( @J ) key cannot override the Numeric Lock feature.
Chapter 4. Features for the 3278 4-11

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English