Hello everyone, I have some problem with the base firmware v4.0 of CPU 1517-3-PN, that it causes some incompatibility with the Intouch Communication Driver . Can I able to downgrade the firmware of this CPU to the lower firmware version like v3.0 or any version of 3.

Hi PhucHo,

The new S7-1500 CPUs (1517(F)-3 PN and 1518(F)-3 PN) were released with firmware version V4.0. Therefore, earlier versions are not available.

Kind regards
Stefan

Hi Stefan,

Thank you very much for supporting me.