Memory Card - Siemens SIMATIC S7-300 Series Reference Manual

CPUs
1.1.4

Memory card

Exceptions
You cannot insert a memory card with the CPUs 312 IFM and 314 IFM (-5AE0x).
These CPUs have an integrated read-only memory.
Purpose of the Memory Card
With the memory card, you can expand the load memory of your CPU.
You can store the user program and the parameters that set the responses of the
CPU and modules on the memory card.
You can also back up your CPU operating system to a Memory Card. except
CPU 318-2.
If you store the user program on the memory card, it will remain in the CPU when
the power is off even without a backup battery.
Available Memory Cards
The following memory cards are available:
Table 1-3 Memory Cards
Capacity
16 KB
32 KB
64 KB
256 KB
128 KB
512 KB
1 MB
2 MB
4 MB
128 KB
256 KB
512 KB
1 MB
2 MB
1-6
Type
The CPU supports the following functions:
S S
Loading of the user program on the
module into the CPU module into the CPU
With this function, the memory of the With this function, the memory of the
CPU is reset, the user program is
5 V FEPROM
downloaded onto the memory card, and
then uploaded from the memory card to then uploaded from the memory card to
the CPU's RAM.
S S
Copying RAM data to ROM (not with
CPU318-3182) CPU318-3182)
5 V RAM Only with the CPU 318-2
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
Remarks
A5E00111190-01