Going Online To Monitor The Values In The Cpu - Siemens S7-1200 System Manual

Online and diagnostic tools
14.11 Monitoring and modifying values in the CPU
14.11.1

Going online to monitor the values in the CPU

To monitor the tags, you must have an online connection to the CPU. Simply click the "Go
online" button in the toolbar.
The "Monitor value" field shows the value for each tag.
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When you have connected to the CPU, STEP 7 turns the headers of
the work areas orange.
The project tree displays a comparison of the offline project and the
online CPU. A green circle means that the CPU and the project are
synchronized, meaning that both have the same configuration and
user program.
Tag tables show the tags. Watch tables can also show the tags, as
well as direct addresses.
To monitor the execution of the user program and to display the values of the tags,
click the "Monitor all" button in the toolbar.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG