Siemens SIMOTION D410-2DP/PN Installation Manual page 93

Power failure
If a power failure occurs, the real-time clock is buffered by means of an internal SuperCap.
The non-volatile data are backed up on the D410‑2 permanently and maintenance-free in an
NVRAM. In this way, the Control Unit is immediately ready for operation without data loss after
a power failure.
Power-up and non-volatile SIMOTION data
The table below lists the cases that can arise during power-up in conjunction with the non-
volatile data and explains how they are handled.
Table 5-3 Power‑up scenarios for non‑volatile SIMOTION data
Cas Initial condition
e
1 The non-volatile SIMOTION data are valid.
2 The non-volatile SIMOTION data are invalid and there is no
backup file (PMEMORY.XML) and no backup copy of the
backup file (PMEMORY.BAK).
3 The non-volatile SIMOTION data are invalid and backup file
(PMEMORY.XML) exists and is valid.
4 The non-volatile SIMOTION data are invalid, the backup file
is invalid and there is no backup copy of the backup file
(PMEMORY.BAK).
5 The non-volatile SIMOTION data are invalid; a backup file
exists, but it is invalid; a backup copy of the backup file
exists and is valid.
Non-volatile SIMOTION data diagnostics
The user can determine the state of the non-volatile SIMOTION data using the diagnostic
buffer, system variables, and PeripheralFaultTask.
SIMOTION D410-2
Commissioning and Hardware Installation Manual, 01/2015
Result
SIMOTION D410‑2 powers up with the non-volatile SI‐
MOTION data, i.e. with the PROFIBUS address in the
non-volatile data.
SIMOTION D410‑2 copies the default settings to the
non-volatile SIMOTION data and powers up with this
data. In this case, for example, the default PROFIBUS
address is used.
SIMOTION D410‑2 copies the backup file contents to
the non-volatile SIMOTION data and powers up with this
data.
SIMOTION D410‑2 copies the default settings to the
non-volatile SIMOTION data and powers up with this
data, in which case, for example, the default PROFIBUS
address is used.
SIMOTION D410‑2 copies the backup file contents to
the non-volatile SIMOTION data and powers up with this
data.
Commissioning (hardware)
5.6 User memory concept
93