Edit online program Simatic step 5,

Hello,

of course you can change it online.

You should also save the change at your offline program.

I don't know what for a PLC do you use and what for a memory type at the PLC (EPROM, EEPROM, RAM).

If you use a RAM-module then can you also change it to the RAM-module.

Otherwise when you don't change this at the memory-module of the PLC then could it be that you lost the change after a restart. This is happens when during the restart your PLC see that the internal memory have not the right program or your buffer battery is down)

You can see the behavior of the PLC during the start procedure at the attachment.
This is a example of the S5-115U from the manual.

regards
CaOd

Hello,

the challenge is that you must erase and program the EEPROM with a special prommer.

e.g. External Prommer

regards
CaOd

Thanks,  so if i want only change it one time , without erase EEPROM is work ? only if AP it's OFF i lost my change is this correct.

Hello,

then can you do it without a lot of effort.

regards
CaOd