Properties Of The User Memory - Siemens SIMOTION D410-2DP/PN Installation Manual

5.6.2

Properties of the user memory

Non‑volatile data
Non‑volatile data makes it possible to retain relevant data for the user and the system even
when the SIMOTION D410‑2 has been switched off. Information about the area which can be
used for non-volatile data is available in the
Data".
A SIMOTION device has the following non‑volatile data:
Table 5-1
Non-volatile data
Kernel data
Retain variables
Retain TO
DCC blocks
NVRAM (SINAMICS)
Note
DCC SIMOTION blocks with retain behavior act like retain variables in terms of copying RAM
to ROM, resetting memory, downloading, backing up non‑volatile SIMOTION data
(_savePersistentMemoryData) and backing up data.
With DCC SINAMICS blocks, data buffering is only via NVRAM. SINAMICS data are not saved
with _savePersistentMemoryData. The non-volatile SINAMICS data (NVRAM data) is backed
up by setting the CU parameter p7775 to 1.
For further information on DCC, see the
SIMOTION D410-2
Commissioning and Hardware Installation Manual, 01/2015
Non‑volatile data contents
Content
● Last operating state
● IP parameters (IP address, subnet mask, router address)
● DP parameters (PROFIBUS DP address, baud rate)
● Diagnostic buffer
● Variables in the interface or implementation section of a unit declared with
VAR_GLOBAL RETAIN
● Global device variables with the "RETAIN" attribute
Absolute encoder offset
SAV blocks and user-defined blocks with retain behavior ("SAV = SAVE",
blocks for the non-volatile data backup).
For the SINAMICS Integrated and for the SINAMICS S120 CU310-2/
CU320-2, data protected against loss at power failure is called NVRAM data
or non-volatile data.
SIMOTION D410‑2 Manual, Section "Technical
DCC Programming Programming Manual.
Commissioning (hardware)
5.6 User memory concept
87