Configuration Of The Static User Memory; Division Of The Static Nc Memory - Siemens SINUMERIK 840D sl Function Manual

S7: Memory configuration

15.4 Configuration of the static user memory

"Automatic memory reconfiguration" function (AMR)
Active file system
The AMR function enables the reconfiguration of memory areas of the active file system
(Page 799) without having to create and then read back a commissioning archive to prevent
the loss of user data.
If the function is active (see paragraph below "Activation: "Automatic memory reconfiguration"
(AMR)") and memory-configuring machine data that affects the active file system is modified,
it is first checked whether all data of the active file system can be buffered locally. If this is the
case, the data of the active file system will be buffered locally on activation of the modified
memory configuration by triggering an NC reset. After the buffering has completed, the memory
of the active file system is reconfigured. Finally, the buffered data of the active file system is
read back.
If the data of the active file system cannot be buffered, Alarm 4400 is displayed. Then, before
activating the machine data change, a commissioning archive containing the relevant user
data should be created.
Passive file system
If machine data that requires a reconfiguration of the passive file system is changed, Alarm
4400 will always be displayed, independent of the AMR function. Then, before activating the
machine data change, a commissioning archive containing the relevant user data should be
created.
If machine data that only requires a reconfiguration of the active file system is changed, the
data of the passive file system is retained.
Activation of the AMR function
The "Automatic memory reconfiguration" function (AMR) is activated via machine data:
MD17950 $MN_IS_AUTOMATIC_MEM_RECONFIG = TRUE
References
Creating a commissioning archive
Commissioning Manual: CNC commissioning: NC, PLC, Drive; Chapter "Saving and managing
data" > "Creating a commissioning archive"
15.4 Configuration of the static user memory
15.4.1

Division of the static NC memory

The static NC memory is used jointly by the system and by the user. The area available to the
user is defined as the static user memory. It contains the data from the active and passive file
system.
The figure below shows the principle division of the static NC memory for SINUMERIK 840D sl:
802
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions