Siemens PLC 315 does not start?

Hi, I have a question.

I have a Siemens PLC S315-2.

When the operating voltage is applied, this goes directly to a total error and can't be reset via masteresett. Furthermore, it can't be connected to the laptop via DP or via Pne. What could be the mistake?

For info:

When starting, only the red Sf LED flashes. All other LEDs remain dark (except the Mreset is activated. Then the stop LED also goes off)

That's a good question… Have you ever tried to start without a memory card?

otherwise I would say the thing is in the bag: /. The problem is then that you don't get any concrete details regarding the error output. Neither an error code nor a bit message. Somehow you can guess more than you know.

but to be honest, you should probably ask in a specialist forum, because plc is really nothing for most hobbyists. Even if many want to pretend to be the ultra-technology professionals par excellence… That is tough stuff and for I say 98% here garnix. At least from the computer area you will not get any useful answers hehe

Yes, we've tried this before. Another memory card with a working system inserted.

Well then the need is great: /

Slap the thing on a rack and take the power supply that goes with it.

Replace the backup battery.

Then a digital output or input assembly on it.

Check your connection cable to the PG.

When programming DP you have to go "offline"!

Try broadcasting a program.

If it doesn't work then the CPU unit is ready for service.