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fritz · Member Joined: 26 Dec 2015 Posts: 179

Example of programming a softkey to be retentive.
With firmware version V1.81.02 and higher (FS:05) the status of the softkey is not saved retentively although retentivity has been set on the block. This behavior has been improved with firmware versions >1.81.03.

For example, you can use the retentive block "Pulse Relay" to retain the status of the softkey even after a power failure.
Example of programming a softkey to be retentive. Example of programming a softkey to be retentive.

Example of programming a softkey to be retentive. Example of programming a softkey to be retentive.

Parameterize the softkey as a button and set the required initial status.
Disable retentivity for the softkey (Rem = off).
Enable retentivity for the pulse relay (Rem = on).
Connect the output of the softkey to the trigger input of the pulse relay.
Since different versions of LOGO! 0BA8 handle the "Softkey" block with enabled retentivity differently, it is recommended to always use the "Softkey" block without retentivity (Rem = off).
https://support.industry.siemens.com/cs/attachments/109750894/109750894_RemSoftkey.zip