Functions
5.3 Shared device
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
145
These errors do not show up until operation and are output as configuration errors, for
example.
Note
After a configuration has been loaded in the IO controller, non
-assigned modules or
es retain their current parameterization state to ensure the independence from the
parameterizations of other IO controllers.
Configuring an I-device as a shared device
Below, you will find a description of how you configure an S7-1500 as an I-device with
STEP 7 Version 13 or higher and then use it in two projects as a shared device.
A "distributed" configuration with different engineering tools for different IO controller families
is generally also possible here. The procedure described below is based on STEP 7 V13 and
is limited to a configuration with two IO controllers of the S7-1500 family that share the
transfer areas of an I-device as a shared device. The I-device itself is also an S7-1500 CPU.
Three projects are created with one IO controller each (PLC-I-Device, PLC_1, and PLC_2).
PLC-I-Device is used to configure the I-device. The PROFINET GSD variant of PLC-I-Device
is used in the PLC_1 and PLC_2 projects in order to assign the transfer areas in the
respective higher-level IO controller.
For the introduction of the shared I-device concept, two roles are distinguished:
● The role of manufacturer (e.g., machine manufacturer): The manufacturer configures and
programs an I-device that performs a particular automation task. Transfer areas are
defined as the I/O interface to the operator of the machine. These transfer areas can be
assigned to different IO controllers. For the connection to higher-level IO controllers, the
manufacturer provides a PROFINET GSD file and discloses the transfer areas via which
the I-device can be accessed.
● The role of the operator: The operator uses the I-device as a PROFINET GSD variant
during configuration of the PROFINET IO system and, in this process, specifies the
I/O addresses under which the IO controllers access the transfer areas.
You assign the following parameters for an S7-1500 CPU as an I-device: centralized and
distributed I/O, the desired transfer areas, and the number of IO controllers having access to
this I-device (always greater than 1 for a shared device!).
Special consideration: The I-device is configured without a higher-level IO controller. As a
result, only the local I/O addresses of the transfer area are available (= "Address in the I-
device") in order to create the user program for editing the addresses from the transfer area.
The I-device that has been completely configured except for the connection to the higher-
level IO controller is loaded to the S7-1500 CPU.
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