Create Tags For The I/O Of The Cpu - Siemens SIMATIC S7-1200 Manual

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3.2 Create tags for the I/O of the CPU

3.2 Create tags for the I/O of the CPU
"PLC tags" are the symbolic names for I/O and addresses. After you create a PLC tag,
STEP 7 stores the tag in a tag table. All of the editors in your project (such as the program
editor, the device editor, the visualization editor, and the watch table editor) can access the
tag table.
Zoom the device configuration to over 200% so that the I/O points of the CPU are legible and
selectable. Drag the inputs and outputs from the CPU to the tag table:
1. Select I0.0 and drag it to the first row of the tag table.
2. Change the tag name from "I0.0" to "Start".
3. Drag I0.1 to the tag table and change the name to "Stop".
4. Drag Q0.0 (on the bottom of the CPU) to the tag table and change the name to
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In the tool bar, click the "Split editor space horizontally" button.
"Running".
With the device editor open, open a tag table.
You can see the open editors displayed in the editor bar.
STEP 7 displays both the tag table and the
device editor together.
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Manual, 11/2011, A5E02486774-04