Siemens SIMATIC C7-621 Manual page 36

Displaying and Entering Values in Screens
Configuring the output field
Position the cursor in the first line of the second screen entry after the configured text
Curr.number:. In the menu bar, select Insert → Input/Output Field.
In the Input / Output dialog box, set the field type to Output and the field length to 4.
Now click the button
WORD as the type, and DB46 and DBW 2 as the interface range. Save your entries with OK .
Position the cursor between the text Curr.number: and the output field {Number}. Now enter
blanks to make full use of the line. But make sure you do not exceed the maximum of 20 characters
per line. 11 characters of text plus 4 characters of field length therefore mean a maximum of 5
blanks.
Adjusting the control program
To allow the exchange of data between the C7 PLC and C7-OP you must still adjust your previous control
program and reload it.
In the PLC create the data block DB46. The length of the DB46 must be at least three data words. In
the SIMATIC Manager select the Blocks folder and insert a data block via Insert → S7 Block → 4
Data Block . In the dialog box which appears, assign the internal ID DB46.
Open the data block DB46 and select Data Block as the desired type. Confirm the settings with OK .
In the DB Editor, activate the second entry with the mouse in the Name column. Assign here the
name max.parcels for the DW0 and complete your entry with Return.
This automatically activates the entry Type. Click on the entry with the right mouse button, insert the
type WORD via Elementary Types , and complete your entry with Return again.
As the default for the highest count, enter W#16#0005 .
In the Comment column you can enter a comment for the data word. Complete your entry with
Return.
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. The Tag dialog box is displayed. Enter Number as the variable name,
Getting Started with C7-621-AS-i
04/99