Siemens ET 200SP HA, Equipment Manual

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3.3.2 Redundancy switchover times for the fail-safe modules
Definition
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.
Configuration 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 configuration:
Make sure that IP parameters are assigned correctly and access of the IO controllers to the
individual submodules is ensured.
– Shared device in different projects:
The stations with the IO controllers that use the shared device are created in different
projects. It must be ensured in each project that the shared device has the exact same
configuration 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 configuration 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 configuration 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 configuration tool as well as in the
hardware configuration.
Product overview
3.4 Shared Device
IM 155-6 PN HA
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Equipment Manual, 09/2021, A5E39262148-AE