Operate project
9.1 Basic principles of operation
TP 270, OP 270, MP 270B (WinCC flexible)
Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
9-15
9.1.3.3
Input of values
Selection
When you select an object, the content entire field is highlighted by a color change. After
pressing any key (except the cursor key), the functions immediately deletes the field content
and displays the new entry.
To move the cursor to any position in the selected box, press the key
SHIFT
plus the relevant
cursor key. The selection of the field content is cancelled.
Note
To enter the hexadecimal characters "A" to "F", toggle the input keys using
A-Z
to activate
the letter assignment.
Numeric I/O boxes may be assigned limit values. In this case, the system accepts only the
values which lie within the configured range. The system rejects any values which are
outside these limits and restores the original value. In this case, the HMI device outputs a
system alarm.
9.1.3.4
Calling the operator note
Purpose
The operator notes provide the programmer with additional information and operating
instruction relating to alarms, screen and operable screen objects. An operator note may
contain information about the permissible range of values for an I/O field (refer to figure
below) or, in the case of an alarm, information on the causes of an alarm event and its
elimination.
Figure 9-6
Operator note for an I/O field (Example)
