Table of Contents
Advertisement
Reference Information
You can load the entire user program
or individual portions thereof (e.g.,
FBs, FCs, OBs, DBs, or SDBs) onto
the load memory area in STOP
mode or RUN mode.
If you remove the RAM card from the
CPU, the stored information will be
lost. In addition, the CPU prompts
you to perform a memory reset. The
RAM card does not have an
integrated backup battery.
If an external backup voltage is fed
to the "BATT." socket, the contents
of the RAM card are retained after
the PC has been switched off as long
as the RAM card remains inserted in
the CPU.
What Memory Card Capacity Should You Use?
The capacity of the memory card you use depends on the scope of the user
program and the additional memory requirement resulting from the use of function
modules and communication modules. You can estimate the memory requirement
for these modules with STEP 7.
160
RAM Card
Hardware Installation and Operating Manual, Edition 02/2006, A5E00273194-02
FLASH Card
You can only reload your user
program in its entirety. You can
reload small portions of your user
program to the load memory area
integrated in the CPU with the aid of
the programming device. If changes
involve large portions of your
program, you have to reload the
entire user program onto the FLASH
card.
The FLASH card does not need
voltage to store its contents -- in
other words, the information
contained on the card is retained if
you remove the FLASH card from the
CPU or operate your system without
a backup battery (without external
backup voltage at the "BATT."
socket.
Windows Automation Center, WinAC Slot Version 4.0
Advertisement
Table of Contents
