Configuring Hardware and Communication Connections STEP 7.pdf

Structured device names
Configuring PROFINET IO Devices
You can also structure the device name according to DNS conventions. To help
you in structuring the names, use a period (".") as shown.
.....
STEP 7 supports you here by providing a prompt-driven dialog for using the name
of the IO system in the device name:
.
You can set the name of the IO system at central location in the property dialog of
the IO system.
When you copy an IO device to another IO system, STEP automatically applies the
name of the IO system into which the device was inserted.
Device number
In addition to the device name, STEP 7 assigns a device number to the device
when it is inserted. These numbers start with "1".
These device numbers are used to identify IO devices (e.g. SFC 71 "LOG_GEO")
in the user program. Unlike the device name, the device number is not visible in the
user program.
Configuring Hardware and Communication Connections with STEP 7
A5E00706939-01 4-5