Siemens SIMATIC HMI OP3 Equipment Manual page 61

Special Screens
If the most significant bit has been set in the data word (=1), the screen
number refers to a special screen. If the most significant bit has not been set
(=0), the screen is a user-defined screen.
The screen numbers of the special screens are listed in the table below. An
offset of 128 (most significant bit = 1) has to be added to these screen
numbers.
Screen selection The procedure for selection of screen 5 by the PLC is described below:
via the controller
1. A screen is open on the the OP3.
2. Before the application program enters
3. The OP3 detects the change from 0 to
Operator Panel OP3
Edition 11/99
Screen No.
0 Screen directory
25 Status Variable
26 Force Variable
30 Language selection
31 Changing the operating mode
35 Set time/date
36 MPI address/baud rate
55 Password login
56 Password edit
the value 5 in the second word of the
screen number area, it has to set the
screen number briefly to 0 ...
... and enter the value 5 following a pol-
ling cycle at the earliest (1 second).
5 and opens screen 5.
Process-Dependent Operator Guidance
Special Screen
Screen No.
1st word x
2nd word x
Screen No.
1st word
x
2nd word
0
Screen No.
1st word x
2nd word 5
Screen No.
1st word 5
2nd word 5
Entry No.
x
x
Entry No.
x
x
Entry No.
x
x
Entry No.
11-5