5.3.2
Properties of the user memory
Non‑volatile data
Non‑volatile data make it possible to retain relevant data for the user and the system even
when the SIMOTION D4x5‑2 has been switched off. Information about the area which can be
used for non-volatile data is available in the
SIMOTION D4x5‑2, Technical Data Manual.
A SIMOTION device has the following non‑volatile data:
Table 5-1
Non‑volatile data contents
Non-volatile data
Content
Kernel data
● Last operating mode
● IP parameters (IP address, subnet mask, router address)
● DP parameters (PROFIBUS DP address, baud rate)
● Diagnostic buffer
Retain variables
● Variables in the interface or implementation section of a unit declared with
VAR_GLOBAL RETAIN
● Global device variables set with the "RETAIN" attribute
Retain TO
Absolute encoder offset
DCC blocks
SAV blocks and user-defined blocks with retain behavior ("SAV = SAVE",
blocks for the non-volatile data backup).
NVRAM (SINAMICS)
For the SINAMICS Integrated, CX32-2 and SINAMICS S120 CU310-2/
CU320-2, data protected against loss at power failure is called NVRAM data
or non-volatile data.
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.
For the SINAMICS Integrated and CX32‑2, the data backup of the SINAMICS retain data (and
therefore also for SINAMICS DCC) is performed via the NVRAM (D4x5‑2) or the FRAM
(CX32‑2). SINAMICS data is 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
DCC Programming Programming Manual.
Commissioning (hardware)
5.3 User memory concept
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
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