Siemens simatic c7-621, Руководство пользователя

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Displaying and Entering Values in Screens 04/99
38 Getting Started with C7-621-AS-i
The following diagram shows the connection between the value entered, the control program and the
current number of parcels counted.
7 8 9
4 5 6
1 2 3
. 0
+
/
-
ENTER
3
Parcels
DW contents = variable value
3 DBW0
01
DBW2
DB46
max.number
Screen: Parcels_1
== 3
Control program
:STL
L DB46.DBW 0
T DB46.DBW 2
F1 F2 F3
F4
F5
SF
DC5V
FRCE
RUN
STOP
1 2 3
7 8 9
6
4 5
0
SIMATIC C7-621
ENTER
ESC
S H IF T
+/-
The values of the input are stored in the data interface (DB46).
The control program evaluates the current entries and updates the data in the interface for the output.
The C7-OP independently reads all values from the interface and updates its display.
Linking and branching between screens via softkeys
So that you can also call the second screen on the C7, you must configure the change from the start
screen
Start_Sys1
to the system screen
Parcels_1
and back with ProTool/Lite. You must also be
able to navigate in the system screen a screen branch from the first screen entry to the second screen
entry and back.
To do this you assign the ‘Select Screen’ function to a softkey in both screens. These softkeys are used
to change the screen. In the system screen you assign the ‘Navigation’ function to a softkey in both
screen entries.
Open the screen
Start_Sys1
and select the Softkey
F5
. The dialog boxes
Softkey-F5
and
Select
Object appear.
In the dialog box Select Objekt choose the function Select Screen from the Screens. A short
description of the function is displayed.