Siemens SIMOTION D455-2 - Properties of the User Memory

Commissioning (hardware)
4.3 User memory concept
SIMOTION D4x5-2
90 Commissioning and Hardware Installation Manual, 02/2012
The SIMOTION Kernel (SIMOTION D firmware) contains the functions required for virtually
all applications, and essentially acts as a PLC featuring an IEC 61131-3-compliant command
set as well as system functions for controlling various components, such as inputs and
outputs.
The SIMOTION Kernel can be expanded by loading technology packages (TPs), e.g. for
motion control or temperature controllers.
In the following sections, you will find information about the user memories and the steps
involved in certain operations.
4.3.2 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 4- 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)
• Diagnostics 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.