How can you detect a change in the S7 user program in STEP 7 V5.5?
The S7 program which is available in this FAQ as a download offers the opportunity to detect changes in the program code and in the hardware configuration. The appropriate checksums from the system status list are determined and verified here.
If a change is detected, a user-definable entry is created in the diagnostic buffer of the CPU.
PROG_CHECK_en.pdf ( 355 KB )
PROG_CHECK.zip ( 253 KB )
The pictures and downloads in this FAQ were created with SIMATIC STEP 7 V5.5.
Program protection, SFC51