Siemens SIMATIC HMI OP3, Руководство по эксплуатации оборудования

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11-5
Operator Panel OP3
Edition 11/99
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 No. Special Screen
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 procedure for selection of screen 5 by the PLC is described below:
1. A screen is open on the the OP3.
1st word
Screen No. Entry No.
x x
2nd word x x
1st word
Screen No. Entry No.
x x
2nd word
0 x
Screen No. Entry No.
x x
5 x
Screen No. Entry No.
5
5
1st word
2nd word
1st word
2nd word
2. Before the application program enters
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).
3. The OP3 detects the change from 0 to
5 and opens screen 5.
Special Screens
Screen selection
via the controller
Process-Dependent Operator Guidance