Inserting A Memory Card - Siemens SIMATIC S7-400 Hardware And Installation Manual

6.7

Inserting a Memory Card

The Memory Card as Load Memory
You can insert a memory card in all CPUs of the S7-400. It is the load memory of
the CPU. Depending on the type of memory card, the user program is retained on
the memory card even when power is removed.
What Type of Memory Card Should You Use?
There are two types of memory card: RAM cards and Flash cards.
Whether you use a RAM card or a Flash card depends on how you intend to use
the memory card.
only intend to expand the integrated load
memory of the CPU,
want to store your user program
permanently on the memory card, even with
power removed (without backup or outside
the CPU),
Further information on the memory cards can be found in the Reference Manual ,
Chapter 8.
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
If You ... ...Then
you should use a RAM card.
you should use a Flash card.
Starting Up
6-11