Technical data

Installation
2.2 Installing STEP 7
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 53
2.2.2 Setting the PG/PC Interface
Here you configure the communication between the PG/PC and the PLC. During installation, you
are displayed a dialog for assigning parameters to the PG/PC interface. You can also open this
dialog box after installation, by calling the program "Setting PG/PC Interface" in the STEP 7
program group. This enables you to modify the interface parameters at a later time, independently
of the installation.
Basic Procedure
To operate an interface, you will require the following:
• Configurations in the operating system
• A suitable interface configuration
If you are using a PC with an MPI card or communications processors (CP), you should check the
interrupt and address assignments in the Windows "Control Panel" to ensure that there are no
interrupt conflicts and no address areas overlap.
In Windows 2000, Windows XP and Server 2003, the ISA component MPI-ISA card is no longer
supported and therefore no longer offered for installation.
In order to make it easier to assign parameters to the programming device/PC interface, a dialog
box will display a selection list of default basic parameter sets (interface configurations).
Assigning Parameters to the PG/PC Interface
Procedure (Detail are found in the Online Help):
1. Double-click on "Setting PG/PC Interface" in the "Control Panel" of Windows.
2. Set the "Access Point of Application" to "S7ONLINE."
3. In the list "Interface parameter set used", select the required interface parameter set. If the
required interface parameter set is not displayed, you must first install a module or protocol via
the "Select" button. The interface parameter set is then generated automatically. On
plug-and-play systems, you can not install plug and play CPs manually (CP 5611 and CP
5511). They are integrated automatically in "Setting PG/PC Interface" after you have installed
the hardware in your PG/PC.
- If you select an interface which is capable of automatic recognition of bus parameters
(for example, CP 5611 (Auto)), you can connect the programming device or the PC to the
MPI or PROFIBUS without having to set bus parameters. If the transmission rate is < 187.5
Kbps, there may be a delay of up to one minute while the bus parameters are read.
Requirement for automatic recognition: Masters who broadcast bus parameters
cyclically are connected to the bus. All new MPI components do this; for PROFIBUS
subnets the cyclic broadcast of bus parameters must be enabled (default PROFIBUS
network setting).
4. If you select an interface which does not automatically recognize the bus parameters, you
can display the properties and adapt them to match the subnet.