Where do you find the latest firmware for S7-41x CPUs?
In order to obtain a quick overview of current firmware versions, the lists below contain
the current firmware versions of the S7-400 CPUs. The download link is in
the right-hand column. Generally speaking, you should always use the latest version of the
firmware on the CPU.
S7-41x CPU FW-Updates (892,3 KB)
A list of the current firmware for the CPUs S7-31x, IM15x and BM147 is available in Entry-ID: 26290163
CPU, Operating system update, Firmware, FW, Update, Download