Monitoring And Modifying Values In The Cpu; Going Online To Monitor The Values In The Cpu - Siemens SIMATIC S7 System Manual

107BOnline and diagnostic tools

14.10 Monitoring and modifying values in the CPU

14.10 Monitoring and modifying values in the CPU
STEP 7 provides online tools for monitoring the CPU:
● You can display or monitor the current values of the tags. The monitoring function does
● You can also use other functions to control the sequence and the data of the user
Table 14- 3
Editor
Watch table
Force table
Program editor
Tag table
DB editor
14.10.1

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.
642
not change the program sequence. It presents you with information about the program
sequence and the data of the program in the CPU.
program:
– You can modify the value for the tags in the online CPU to see how the user program
responds.
– You can force a peripheral output (such as Q0.1:P or "Start":P) to a specific value.
– You can enable outputs in STOP mode.
Note
Always exercise caution when using control functions. These functions can seriously
influence the execution of the user/system program.
Online capabilities of the STEP 7 editors
Right-click an object in the "Compare to" column and
select "Start detailed comparison" button to show the
code blocks side-by-side.
The detailed comparison highlights the differences
between the code blocks of online CPU and the code
blocks of the CPU in your project.
Monitor
Yes
Yes
Yes
Yes
Yes
Modify
Yes
No
Yes
No
No
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
Force
No
Yes
No
No
No