Installing the CPU 41x-2 PCI and the Software
Windows Automation Center, WinAC Slot Version 4.0
32
Hardware Installation and Operating Manual, Edition 02/2006, A5E00273194-02
2.3.2
When are the Warm Restart and Autoload Features Available?
Autoload
If the CPU 41x-2 PCI is not connected to an external 24 VDC power supply, you
can use the Autoload feature to load user data.
With the Autoload feature, the PC automatically retrieves a STEP 7 user program
(stored in a file on the memory card) and loads the program onto the CPU 41x-2
PCI following a Power Off/Power On. Then, the CPU 41x-2 PCI automatically
selects the previously stored operating mode and executes the STEP 7 user
program accordingly.
The use of a backup battery, an independent 24 VDC supply, or a Flash Card
precludes the use of the Autoload feature:
•
If you are using a backup battery, the STEP 7 user program is retained after
Power Off/Power On.
•
If you connect the CPU 41x-2 PCI to an independent 24 VDC supply, the
STEP 7 user program continues running or is retained after Power Off/Power
On, depending on the error OB.
•
If you are using a FLASH card, the STEP 7 user program is automatically
loaded from the FLASH card after Power Off/Power On.
Independent
24 VDC
power supply
Backup
battery
Memory card
Warm restart
possible after
Power On of PC?
Autoload
feature
available?
RAM card/none
No
Yes
No
No
FLASH card
No
No
RAM card/none
Yes
No
No
Yes
FLASH card
Yes
No
RAM card/none
CPU continues to
be supplied from
external 24 VDC
power supply!
No
Yes
No
FLASH card
CPU continues to
be supplied from
external 24 VDC
power supply!
No
Yes
Yes
RAM card/none
CPU continues to
be supplied from
external 24 VDC
power supply!
No
FLASH card
CPU continues to
be supplied from
external 24 VDC
power supply!
No
