Siemens SIMATIC S7-1200

Online and diagnostic tools
15.2 Going online and connecting to a CPU
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1313
15.2
Going online and connecting to a CPU
You must establish an online connection between the programming device and CPU for
loading programs and project engineering data as well as for activities such as the following:
● Testing user programs
● Displaying and changing the operating mode of the CPU (Page 1321)
● Displaying and setting the date and time of day of the CPU (Page 1316)
● Displaying the module information
● Comparing and synchronizing (Page 1323) offline to online program blocks
● Uploading and downloading program blocks
● Displaying diagnostics and the diagnostics buffer (Page 1322)
● Using a watch table (Page 1329) to test the user program by monitoring and modifying
values
● Using a force table to force values in the CPU (Page 1332)
To establish an online connection to a configured CPU, click
the CPU from the Project Navigation tree and
click the "Go
online" button from the Project View:
If this is the first time to go
online with this CPU, you
must select the type of PG/PC
interface and the specific
PG/PC interface from the Go
Online dialo
g before estab-
lis
h
ing an online connection to
a CPU found on that inte
r-
face.
You have now connected your programming device to the CPU. The orange color frames
indicate an online connection. You can now use the Online & diagnostics tools from the
Project tree and the Online tools task card.