Functions
5.9 Standard machine projects
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
223
The option "Permit overwriting of PROFINET device name" must be selected (CPU
parameters, properties of the PROFINET interface, Ethernet addresses area) so that the
IO controller can adapt the device name later at the operator.
This option is disabled by default.
The following figure shows the above-described settings for the IP address and PROFINET
device name.
After the configuration is loaded from the standard machine project, the IO controller has no
device name and no IP address.
Following loading, the IO devices have a device name and a device number but no IP address.
Figure 5-79 Settings for the IP address and the PROFINET device name
How an IO device obtains an IP address locally
Below, you will find an explanation of the "IP address is set by the IO controller during
runtime" and "IP address is set directly at the device" options, which can generally be
configured for a multiple use IO system.
If you have set the "Multiple use IO system" option for the IO system, STEP 7 automatically
sets the "IP address is set by the IO controller during runtime" option for the IO devices.
In this case, the IO controller assigns the IO device an IP address that results from the
locally assigned IP address of the IO controller (see next section). This option is appropriate
if the IO device is a field device, e.g., ET 200MP, ET 200SP, ET 200AL, or another
distributed I/O system.
If the IO device is not a "standard" field device, for example, an HMI device for a Windows
operating system, the "IP address is set by the IO controller during runtime" option described
above does not work. In this case, choose the "IP address is set directly at the device"
option. You must then assign the IP address to the device locally and take steps to ensure
that this address is suitable for the IP addresses of the other IO devices and the IP address
of the IO controller.
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