Siemens ET 200SP HA - Redundancy Switchover Times for the Fail-Safe Modules; Shared Device; Using IO Device as Shared Device; Shared Device in the same STEP 7 Project

3.3.2 Redundancy switchover times for the fail-safe modules
De󹪝nition
With redundant operation of the interface modules of the ET 200SP HA, you should expect a
switchover time to the active communication channel of a maximum of 500ms. During this
time, the input and output values may be frozen during a redundancy switchover.
3.4 Shared Device
3.4.1 Using IO device as Shared Device
Requirement
Note
For use in STEP 7 you need the HSP 272 version V1.1 and higher.
Con󹪝guration basics
• A shared device must have the same IP parameters and the same device name in each station.
– Shared device in the same STEP 7 project. The following two cases must be distinguished
during con󹪝guration:
Make sure that IP parameters are assigned correctly and access of the IO controllers to the
individual submodules is ensured.
– Shared device in di󹪜erent projects:
The stations with the IO controllers that use the shared device are created in di󹪜erent
projects. It must be ensured in each project that the shared device has the exact same
con󹪝guration in each station. Only one IO controller may have full access to a submodule
at any given time. The IP parameters and device names must be identical. Inconsistencies
in the con󹪝guration will result in a failure of the shared device.
3.4.2 Shared device in the same STEP 7 project
Introduction
The example below describes the most basic con󹪝guration of a shared device: Two IO controllers
share the I/O modules of an IO device. The two IO controllers are located in the same project.
To use the shared device function, steps are required in the con󹪝guration tool as well as in the
hardware con󹪝guration.
Product overview
3.4 Shared Device
IM 155-6 PN HA
12 Equipment Manual, 09/2021, A5E39262148-AE