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Will the Codesys runtime environment properly shutdown and save all retain variables when Raspberry PI shuts down by 'shutdown --halt' command?
And more general question: does the Codesys on Raspberry PI honor retain variables and where does it save them?
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi,
you need a graceful shutdown of the Linux OS only then the Retain file is saved by the plc runtime.
So the only possibility to have reliable retains to use an UPS -Uninterruptible power supply which
Triggers then a shutdown of the Linux system.
the retains file will be saved to /root/ in case your Applcation is named Application you will find there Application.ret
BR
Edwin
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Will the Codesys runtime environment properly shutdown and save all retain variables when Raspberry PI shuts down by 'shutdown --halt' command?
And more general question: does the Codesys on Raspberry PI honor retain variables and where does it save them?
Hi,
you need a graceful shutdown of the Linux OS only then the Retain file is saved by the plc runtime.
So the only possibility to have reliable retains to use an UPS -Uninterruptible power supply which
Triggers then a shutdown of the Linux system.
the retains file will be saved to /root/ in case your Applcation is named Application you will find there Application.ret
BR
Edwin
Edwin, thank you for assistance. Now I'm working on UPS PIco integration with Codesys. So my Raspberry PI has UPS.