Siemens SIMATIC S7-1200

Communication
11.2 PROFINET
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
939
Boundary conditions
The following boundary conditions result because a shared device configuration is
distributed across several projects:
● The addresses of modules or submodules that are not assigned to this IO controller are
missing in the address overview of each IO controller that has access to a shared device.
● The modules or submodules that are not assigned are not taken into consideration in the
configuration limit calculation for the shared device during the consistency check. For this
reason, you must verify for yourself that the maximum number of submodules or the
maximum amount of cyclic IO data for the shared device will not be exceeded. For
information on the maximum quantities, refer to the documentation for the devices you
are using.
● Configuration errors such as the assignment of a module or submodule to several IO
controllers are not detected in STEP 7.
● CPUs that are loaded with a shared device configuration do not have any information on
whether the IO device is a shared device. Modules or submodules that are assigned to
other IO controllers and therefore other CPUs are missing in the loaded configuration.
These modules or submodules are therefore displayed neither in the CPU web server nor
in the CPU display.
11.2.14.2
Example: Configuring a shared device (GSD configuration)
This example describes how to configure a distributed I/O system as a shared device with
STEP 7 V13 SP1 or higher.
A "distributed" configuration with different engineering tools for different IO controller families
is possible. The procedure described below is based on STEP 7 as of V13 SP1 and is
limited to configuration with two IO controllers of the S7-1200 series that share one shared
device.
The example creates two projects with one IO controller each:
● Controller1
● Controller2
You must create the shared device in both projects, even though it is physically one and the
same IO device.
Requirements
● STEP 7 V13 SP1 or higher
● IO device supports shared device functionality (for example, ET 200SP IM 155-6 PN HF
V3.1).
● GSD file for configuring the IO device as a shared device is installed.