Technical data

Establishing an Online Connection and Making CPU Settings
18.1 Establishing Online Connections
Programming with STEP 7
402 Manual, 05/2010, A5E02789666-01
Finding directly connected nodes
The additional information "direct" is not supported for PROFINET nodes. To still be able to find
directly connected nodes, select the PLC > Diagnostics/Settings > Node Flashing Test menu
command.
In the dialog box that is displayed, you can set the flashing duration and then start the flashing test.
The directly connected node will be identified by a flashing FORCE LED.
The flashing test cannot be carried out if the FORCE function is active.
18.1.2 Establishing an Online Connection via the Online Window of the Project
Select this method if you have configured the programmable controller in a project on your
programming device/PC. You can open the online window in the SIMATIC Manager using the
menu command View > Online. It displays the project data on the programmable controller (in
contrast to the offline window that displays the project data on the programming device/PC). The
online window shows the data on the programmable controller both for the S7 program and for the
M7 program.
You use this view of the project for functions involving access to the programmable controller.
Certain functions in the "PLC" menu of the SIMATIC Manager can be activated in the online
window but not in the offline window.
There are two types of access as follows:
• Access with Configured Hardware
This means you can only access modules which were configured offline. Which online modules
you can access is determined by the MPI address set when the programmable module was
configured.
• Access without Configured Hardware
The requirement for this is an existing S7 program or M7 program which was created
independently of the hardware (meaning it lies directly beneath the project). Which online
modules you can access is determined here by specifying the corresponding MPI address in
the object properties of the S7/M7 program.
Access via the online window combines the data on the programmable control system with the
relevant data on the programming device. If, for example, you open an S7 block beneath a project
online, the display is made up as follows:
• Code section of the block from the CPU in the S7 programmable logic controller, and
• Comments and symbols from the database in the programming device (provided they exist
offline) When you open blocks directly in the connected CPU without an existing project
structure, they are displayed as they are found in the CPU, which means without symbols and
comments.