Shared Device; Module-Internal Shared Input / Shared Output (Msi/Mso) - Siemens SIMATIC ET 200eco PN M12-L System Manual

8.3.4

Shared device

Shared device
IO device that makes its data available to up to two IO controllers.
If there is no validity check of the shared device projects by the Engineering System,
note the following:
• Make sure the configurations are consistent. Assign each module or submodule to only
one IO controller. Multiple assignment will result in an error as the module or submodule
will only be available in the first controller.
• If you reconfigure shared device configurations without the validity check mentioned
above, you have to commission the ET 200eco PN M12‑L once again. This means you
must download the projects of all involved IO controllers to the respective CPU again after
reconfiguration. If necessary, perform a POWER OFF/POWER ON of the IO controller and
the I/O device.
NOTE
In the case of a shared device application, make sure that all controllers work with the same
send clock. If the controller does not have the same send clock, this may result in
communication relationships not being set up.
If you set up all controllers in one project, the same send clock is ensured. Set the same send
clock for engineering in separate projects.
Detailed information
You can find additional information on the topic of shared device in the STEP 7 online help
and in the SIMATIC PROFINET with STEP 7
(https://support.industry.siemens.com/cs/ww/en/view/49948856) function manual.
8.3.5

Module-internal shared input / shared output (MSI/MSO)

Module-internal shared input / shared output (MSI/MSO)
The module-internal shared input function allows an input module to make its input data
available to several IO controllers. Each controller has read access to the same channels.
The module-internal shared output function allows an output module to be operated by
several IO controllers. One IO controller has write access. A second IO controller can have
read access to the same channels.
Detailed information
You can find additional information on the topic of Module-internal shared input / shared
output (MSI/MSO) in the STEP 7 online help and in the SIMATIC PROFINET with STEP 7
(https://support.industry.siemens.com/cs/ww/en/view/49948856) function manual.
Distributed I/O system ET 200eco PN M12-L
System Manual, 11/2023, A5E48753295-AG
Configuring
8.3 PROFINET IO
71