Safety X20SL8101 remains in "No execution"

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1

Hello,
I have the safety plc which remains in ‘No execution’. In SafeDesigner there are no errors and the modules and FW/Safe KEY are OK. Looking at the device’s diagnostic LED I have this condition:
“Safe communication channel not OK, openSAFETY connection valid problem or
“SafeOSstate!=RUN”
If the SafeLOGIC controller remains in this state for a longer time, parameter
“Default safe data duration” of the “Group: Safety response time default values”
must be checked.”

In the AS logger I have these alarms but I do not understand what the problem is with these devices:

image
image1856×848 103 KB

Could it be some parameter regarding communication?

Many thanks

Stefano Marelli

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2

Hi Stefano, welcome to the community!
From the suggestsions in the help of logger message -1073553380 this one looks most promising:

Ensure that the safety project and the project of the target CPU do match.

This means to compile and download the projects in AutomationStudio and SafeDESIGNER.

3

Hi Roman, thanks for your suggestion. In the end we found that a bus controller was not in operational state due to an electrical problem. Having solved that, the safety plc went into run state.