s7 300 memory reset

[benji]

hey clemens thanks for the reply but in the catalog it says that only the hot restart isnt available in the 300s and the explanation you wrote about warm restart i guess its for the hot restart, let me know if im wrong

 

[clemens]

Hi Benji:

There is a littlebit of a confusion about this terms. Officially there are three restart types for the new S7-400 CPUs:
COMPLETE RESTART: Resets all non remanent signals & process image
RESTART: "continue" processing where the CPU stopped
COLD RESTART: Resets all signals (remanent & non remanent) & process image
These three modes exist for the newer S7-400 CPUs
The older S7-400 CPUs only have the first two modes.

I hope it helps.

 

[mnsubramanian]

Sorry to butt in in this old thread. In an S7-300 system, all the DC outputs are off. All Analog inputs/outputs are working well. What is the solution? All power OK. Can we do memory reset in some way, other than from the front panel toggle switch?

 

[clemens]

Yes, you may do a memory reset using the programming software Step 7

 

[mnsubramanian]

Thank you. I have done that and now all Digital Outputs are Ok.