Siemens SIMATIC HMI OP3, Equipment Manual

Page: 27 / 126

3-5
Operator Panel OP3
Edition 11/99
3.2.1 Entering Numerical Values
In fields that allow the operator to enter a numerical value, you enter the
numerical value character by character on the keypad.
You enter a decimal point by pressing the
SHIFT key and the sign key
simultaneously.
If there is a value in the field already, it is cleared completely from the field
when the first character is entered. Once input has started, you cannot exit
from the input field until the input has been entered or canceled.
In numerical fields (not in hexadecimal format), input is usually
right-justified. Digits that have already been entered are moved to the left
(pocket calculator format).
Exception:
Input fields for setpoints in bit pattern format – for instance, when calling the
PU functions STATUS/FORCE VAR – are changed to left-justified. When
input begins, the old value does not disappear from the display completely
but its bit pattern is overwritten one character at a time. You move the cursor
in this type of field by simultaneously pressing the
SHIFT key and an arrow
key (
←
or
→
).
You can configure limit values for numerical input fields. In this type of
field, a limit value check takes place. Entered values are applied only if they
are within the configured limits. If a value outside these limits is entered, a
system message is displayed and, after it has been canceled, the old value is
displayed again.
If a numerical field has been configured with a certain number of decimal
places and if, after you confirmed your input, too many have been entered,
the extra ones are ignored; if too few have been entered, the field is fitted
with zeros.
Entering values
with a decimal
point
Changing
numerical values
Right-justified
input
Limit value check
Decimal places
General Operation