Siemens SIMOTION D4x5-2 Commissioning And Hardware Installation Manual page 113

The system variable device.persistentDataPowerMonitoring.persistentDataState indicates the
state of the non-volatile SIMOTION data after power-up.
Table 5-6
State
FROM_RAM (1)
FROM_FILE (2)
FROM_BACKUP (3)
INVALID (4)
Requirement/availability of the battery
System variables can be used to evaluate:
● Whether a battery is required for the operation of the device (or not)
● Whether a battery is available (or not)
Table 5-7
System variable
on the device
fanbattery of data type StructDeviceFanBattery (the system variables are of the data type EnumFan‐
Battery)
.batterynecessary
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
State of the non-volatile SIMOTION data after powering up (persistentDataState system
variable)
Meaning
Non-volatile SIMOTION data in the SIMOTION device is used
Non-volatile SIMOTION data is restored from the backup file
Non-volatile SIMOTION data is restored from the backup copy of the backup
file
Data in the non-volatile SIMOTION data and in the backup file / backup copy
of backup file is invalid or non-existent/deleted.
The SIMOTION device has copied the default settings to the non-volatile SI‐
MOTION data and used this data to power up.
System variable batterynecessary/batteryexisting
States
MANDATORY
OPTIONAL
OPTIONAL_RTC
1)
NOT_MANDATORY
Description
Battery is required for the backup of the non-volatile data
and for the real-time clock (RTC) of the device. .batter‐
yexisting can be used to query whether a battery is in‐
stalled.
The non-volatile data and the real-time clock (RTC) are
backed up via SuperCap. A battery can be used as an
option to extend the backup time. .batteryexisting can
be used to query whether a battery is installed.
Example: D4x5
A battery is not required for backing up the non-volatile
data.
Only the real-time clock (RTC) is backed up via Super‐
Cap. A battery can be used as an option to extend the
backup time of the real-time clock. .batteryexisting can
be used to query whether a battery is installed.
Example: D4x5‑2
A battery is not required for backing up the non-volatile
1)
data. The real-time clock (RTC) is backed up via Super‐
Cap.
Example: D410-2
Commissioning (hardware)
5.3 User memory concept
113