Configuring Hardware and Communication Connections STEP 7.pdf

Configuring PROFINET IO Devices
4.2.2 Basic Procedure for Configuring a PROFINET IO System
If you know how to configure a PROFIBUS DP system, then you already know how
to configure a PROFINET IO system – the procedure is largely the same.
Station window as an image of the real IO system
When have placed an IO controller (e.g. a CPU 317-2 PN/DP) in position, STEP
automatically draws a line that represents the IO system. You then place the IO
devices to be assigned to this IO controller in position by using drag-and-drop to
move them there from the "Hardware Catalog" window in "PROFINET IO".
When an IO device is put in position, a name is automatically assigned to it (the
default name is the name in the GSD file).
STEP 7 also automatically assigns an IP address. Starting with the IP address of
the IO controller, STEP 7 searches for the next available IP address. However, this
IP address is not relevant when handling the objects when configuring the system.
Nevertheless, it is necessary because all nodes on Ethernet with TCP/IP protocol
must have an IP address.
In addition, STEP 7 assigns device number that you can use to work with the
device in the user program (e.g. with SFC 71 "LOG_GEO"). This number is also
displayed in the symbol for the IO device.
Configuring Hardware and Communication Connections with STEP 7
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