At what time would I use NCK commissioning switch position #2

We replaced original NCU when we determined SD Card socket was not reading SD Card.

Following procedure(s) directions said set NCK commissioning switch to #1 (Clear Memory)

then we loaded Achieve.

What to know when and how switch position #2 is supposed to be used, there appears to be no directions in any Siemens manual on its suggested use?

Thanks

2 to 7 reserved for Siemens???

Manual states a use for Position #2 " The NCK (and PLC) boots up with the data that was saved at the last shutdown"

Where does a new NCK get is saved data from?

When does data get saved?

What type(s) of data get saved? 

Are PLC and NC programs saved?

What type of shutdown initiates a save, If I turn power disconnect off, does current running data saved?

I would like to know how this function would work when replacing NCK Module with Original SD card re-installed.

Thanks

Hi Drwestfal,

Which manual are you referencing?

HTH

Luke

SINUMERIK 840D sl/840DE sl CNC software Version 4.5 02/2012 6FC5397-2AP40-3BA0

Page 26