Using The Force Table - Siemens SIMATIC S7-1200 Manual

To monitor the tags, you must have an online connection to the CPU. The following options
are available for modifying tags:
● "Modify now" immediately changes the value for the selected addresses for one scan
● "Modify with trigger" changes the values for the selected addresses.
● "Enable peripheral outputs" allows you to turn on the peripheral outputs when the CPU is
The various functions can be selected using the buttons at the top of a watch table. Enter the
tag name to monitor and select a display format from the dropdown selection. With an online
connection to the CPU, clicking the "Monitor" button displays the actual value of the data
point in the "Monitor value" field.
11.6

Using the force table

A force table provides a "force" function that overwrites the value for an input or output point
to a specified value for the peripheral input or peripheral output address. The CPU applies
this forced value to the input process image prior to the execution of the user program and to
the output process image before the outputs are written to the modules.
Note
The force values are stored in the CPU and not in the force table.
You cannot force an input (or "I" address) or an output (or "Q" address). However, you can
force a peripheral input or peripheral output. The force table automatically appends a ":P" to
the address (for example: "On":P or "Run":P).
Easy Book
Manual, 11/2011, A5E02486774-04
cycle.
This function does not provide feedback to indicate that the selected addresses were
actually modified. If feedback of the change is required, use the "Modify now" function.
in STOP mode. This feature is useful for testing the wiring of the output modules.
To create a watch table:
1. Double-click "Add new watch table" to open a new
watch table.
2. Enter the tag name to add a tag to the watch
table.
Easy to use the online tools
11.6 Using the force table
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