Description of the behavior: When logging in to a Lenze Controller with the PLC Designer, the message: The connected PLC uses certificates which are about to expire. Would you like to open the security screen for details?
Conditions under which the behavior occurs: The message described above occurs the first time you log in to this Lenze Controller.
Background: When the controller boots up, some certificates are automatically generated. This happens for the first time in Lenze production when these devices are manufactured. As no time is set in the controllers for this production step and there is no communication via an NTP connection, the certificates are created with an initial time stamp that is far in the past. When logging in, the PLC Designer checks the certificates stored in the controller and determines the expiry of these certificates.
The expired (validity date in the past) or inactive (empty information field) certificates can be checked in the security screen dialog.
Expired or inactive certificates can be deleted. New certificates are either generated automatically during the next boot or can be created manually via the security screen dialog.
