Siemens ET 200SP HA, Equipment Manual

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Bandwidth reservation in STEP 7
When configuring shared devices in different projects, STEP 7 needs information on the locations
of use of the shared device to ensure correct calculation of the bandwidth. Make the settings
listed below in both projects:
1. Open the project "Shared-Device-1".
2. Open the station of the IO controller "CPU1" from the project "Shared-Device-1" in HW Config.
3. Open the property dialog of the PROFINET IO interface and go to the "Shared Device" tab.
4. Set the following:
– When the IO controller has full access to the interface module of the IO device: The
number of external controllers that access the IO device.
– When the IO controller has no access to the interface module of the IO device: The send
clock of the IO controller with full access.
5. Save and compile the configuration.
6. Repeat steps 1 to 5 for the project "Shared device-2" with CPU2
7. Download the configuration to the stations.
Note
Changing projects
Note that changes to a shared device (e.g. at the interface or port) must always be made in all
projects in which the shared device is being used. The projects must subsequently be compiled
and downloaded.
Shared device in the user program
The shared device has no special role in the user program. The submodules assigned to the
station are addressed as usual using their addresses, while the other submodules are not given
an address.
3.4.4 Useful information on using shared devices
Note the following basic requirements when using shared devices.
Redundant IO device (distributed I/O device with redundant interface modules)
An IO device with redundant interface modules cannot be configured as a shared device.
Send clock for shared devices
The Shared Device function can only be used with even send clocks.
Product overview
3.4 Shared Device
IM 155-6 PN HA
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Equipment Manual, 09/2021, A5E39262148-AE