Warnings/notes on installing, using and starting

When using the documentation "Safety instructions on working with the IDE", it is imperative to consult the safety manuals for the respective target platform and the respective safety →PLC as well.
Observe the following concerning these applicable safety manuals:

• The safety manual for the target platform when using logi.CAD 3 version 3.23.1 to create safety-relevant applications and/or libraries for them is the documentation " logi.µSRTS safety manual" .
  This document is provided by logi.cals to the system integrator. The system integrator might have adapted this document for application when using the system integrator's safety PLC .

• The safety manual for the safety PLC is provided by the system integrator.
  This document is not part of the scope of the documentation "Safety instructions on working with the IDE"

This means: When using logi.CAD 3 version 3.23.1 to create safety-relevant applications and/or →libraries for them, also follow all instructions of " logi.µSRTS safety manual" and the safety manual for the safety PLC. Contact the system integrator to obtain both documents.

Make sure that you are using a variant/version of logi.CAD 3 that has been released by the system integrator for the usage of developing safety-relevant applications and/or libraries for them.
Contact the system integrator for information how to verify this.

Before starting logi.CAD 3 to build safety-relevant applications and/or libraries for these applications when you want to release the applications/libraries: You must verify that the logi.CAD 3 has not been modified by using md5sum with the following commands (when being located in the installation folder of logi.CAD 3):

Make sure that all messages that are displayed afterwards state OK and that no errors with FAILED or warnings are issued.

Then change into the subfolder configuration\com.logicals (of the installation folder of logi.CAD 3):

Make sure that all messages that are displayed afterwards state OK and that no errors with FAILED or warnings are issued.

Do not create logi.CAD 3 →projects containing an application and/or libraries for them within the installation folder of logi.CAD 3.

If you do anyway, it will not possible to test this application as required by the safety introductions of logi.CAD 3 and/or according to the applied standards. As testing of the application is necessary (see "Intended use"), such an application will not be fit for usage in safety-critical areas.

logi.CAD 3 must only be used for developing safety-relevant applications and libraries for them when using a full functional safety management (FSM) process and appropriate fault avoiding measures for the target SIL/ASIL.
This includes module tests with 100% branch coverage, integration and system test or other equally effective measures (see "Recommendations for LVL-workflow" when applying the LVL-workflow).

Regardless of the applied workflow, it is imperative to validate the application. The reason for this is that logi.CAD 3 is used on an unsafe PC. As a consequence, errors in the hardware or the system environment might lead to errors in the application.

It is imperative to consider the warnings included within the logi.CAD 3 user documentation (see logi.CAD 3 user documentation, "User documentation of the development environment"), when using the supported elements for developing safety-relevant applications. Above all but not only observe the warnings about recursions, invalid connections, and conflicts.
In particular, the descriptions of the system blocks must be examined and considered accordingly (see logi.CAD 3 user documentation, "System blocks for the application").

Moreover when using any supported system block that is providing an internal error diagnostic, it is imperative that the application ensures that error conditions do not lead to any loss of the safety function. This is possible as follows:

• either by processing the output ENO of the supported system block

• or by ensuring that the described default output behavior does not affect the safety function

See the logi.CAD 3 user documentation, "Execution control: EN, ENO" for details on the output ENO and for a list of blocks providing an internal error diagnostic. Observe that this list contains all system blocks of logi.CAD 3 – hence, the unsupported system blocks are also included in this list.
See the reference documentation of the system block, sub-section "Internal error diagnostic for block" for details when an error is detected while executing this block with internal error diagnostic.