Configuring Hardware and Communication Connections STEP 7.pdf

4.3.3 Configuration with IE/PB Link
Configuring PROFINET IO Devices
You can use the IE/PB link to connect PROFIBUS DP configurations to
PROFINET IO.
From the standpoint of the CPU, PROFIBUS DP slaves are on the same network
as the IE/PB link. These slaves have the same device names and IP addresses as
the IE/PB link, but do have different device numbers. In addition, they also still
have specific PROFIBUS addresses.
In addition to the device number, the symbol for the IE/PB link also shows the
PROFIBUS address, since this device has two address schemas.
(1) Device number of the IE/PB link
(2) Device number and PROFIBUS address of the DP slave
Handling device numbers and PROFIBUS addresses at the master system
When IO devices are positioned, STEP 7 assigns the same number for the device
number and the PROFIBUS address.
To get an overview of the device numbers and the PROFIBUS addresses being
used, double-click the symbol for the IE/PB link and select the "Device Numbers"
tab.
Each line in the "Device Numbers" tab represents a DP slave. If you select a line
and then click the "Change" button or double-click a line, a dialog box is displayed
in which you can change the device number.
You can change the PROFIBUS address in the usual manner:
1. Double-click the symbol for the DP slave to display its properties dialog.
2. In the "General" tab, click the "PROFIBUS" button.
3. In the next dialog box, change the PROFIBUS address.
Restrictions
The configuration described above applies to DP slaves on the PROFIBUS subnet
of an IE/PB link, subject to the following restrictions:
• No IE/PB link can be inserted
• No DP/PA link can be inserted
• No Y-link can be inserted
• No CiR compatibility
• No redundant slaves can be inserted
• No isochrone mode/constant bus cycle time cane be configured
Configuring Hardware and Communication Connections with STEP 7
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