Commissioning
7.5 User memory concept
SIMOTION C
150
Operating Instructions, 02/2012
7.5.2
Properties of the user memory
Non-volatile data (NVRAM)
Non-volatile data is used with the objective of retaining user- and system-relevant data when
the SIMOTION C is de-energized. You will find information about the area that can be used
for non-volatile data in the SIMOTION SCOUT Configuration Manual.
The following non-volatile data is available in a SIMOTION C:
Table 7- 2
Content of non-volatile data
Non-volatile data
Content
Kernel data
Last operating state
IP parameters (IP address, subnet mask, router address)
DP parameters (DP addresses, 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
The non-volatile data of a SIMOTION C has the following properties:
Table 7- 3
Properties of non-volatile data
Property
Meaning
Location
In the NVRAM of the SIMOTION C, no back-up battery required
Backup time
Unlimited
Note
IP and DP parameters in non-volatile data
If there is a configuration on the MMC, the IP and DP parameters are loaded from the MMC
during ramp-up, written to the non-volatile data and used by the SIMOTION C. The
SIMOTION C uses the addresses defined in these parameters to go online. The IP and DP
parameters in the non-volatile data are retained and used by the SIMOTION C if a ramp-up
is performed with an MMC that does not contain a configuration.
A SIMOTION C can therefore always go online if a configuration has been loaded at least
once with the SIMOTION SCOUT, or if the SIMOTION C has been ramped up once with an
MMC.
