Siemens SIMATIC C7-621 Manual page 19

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Select the Blocks folder in the SIMATIC Manager and insert a data block with Insert → S7 Block → 4
Data Block . In the dialog box that appears, assign the internal identifier DB1.
Open data block DB1 and select Data Block as the desired type. Accept the settings with OK .
Select the second entry in the Name column and enter here the name M1_In1.
Complete your input by pressing Return.
The Type entry is automatically activated. Click on the entry with the right mouse button, enter the
type BOOL via Elementary Types , and complete your input with Return.
Enter FALSE as the initial value and press Return.
In the Comment column you can add a comment to the entry Module_no.1 Input_1.
Repeat your entries for all slaves.
Getting Started with C7-621-AS-i
Programming Preparations
19