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Siemens SINUMERIK 840D sl Function Manual page 605

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After activation of the new drive configuration, the programs can be freely distributed among
the available drives.
Note
All the previous drives may no longer be available in the newly created drive configuration.
Access to the programs on these drive is then no longer possible.
Remedy: First copy the programs stored on these drives to a drive that can still be accessed.
Note
Because protected cycles (_CPF files) are only executed from the NC part program memory
for system reasons, they cannot be stored for execution on an external program memory.
The previous NC part program memory with the MPF.DIR, SPF.DIR and WKS.DIR directories
is not absolutely necessary when using EES. A system can also be configured without using
the NC part program memory.
NOTICE
Executing programs that are not visible
Even if the NC part program memory was removed from the drive configuration, it is always
still available in the system itself. This especially means that when executing the program it
is possible that programs that still exist there are inadvertently executed from the SPF.DIR.
Remedy: If the system is configured without NC part program memory in the drive
configuration, any programs still stored there should be deleted manually.
If the NC part program memory is still to be used, then it should not be completely removed
from the system, only assigned an appropriate protection level when required.
Drives can be shared by more than one station (PCU/NCU). A standard drive configuration for
these stations means that there is a standard program view that is independent of the particular
station.
Note
The CF card of an NCU/PPU cannot be shared by several stations.
SINUMERIK 840D sl only
For operation with an external HMI, the drives must be configured on the external HMI! The
drive configuration (logdrive.ini) must be loaded into the corresponding NCU from the external
HMI. A softkey is available for the transfer on the dialog for the drive configuration.
In systems in which multiple NCs work together, the drive configuration must be identical for
all NCs. This is achieved by distributing the logdrive.ini across the corresponding NCUs.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
K1: Mode group, channel, program operation, reset response
9.15 EES (optional)
605

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