Siemens CPU 314 Reference Manual

CPUs
1-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
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
Type Remarks
16 KB
32 KB
The CPU supports the following functions:

64 KB
 Loading of the user program on the
module into the CPU
256 KB
module into the CPU
With this function, the memory of the
128 KB
5 V FEPROM
With this function, the memory of the
CPU is reset, the user program is
512 KB
downloaded onto the memory card, and
then uploaded from the memory card to
1 MB
then uploaded from the memory card to
the CPU’s RAM.

2 MB
 Copying RAM data to ROM (not with
CPU318-3182)
4 MB
CPU318-3182)
128 KB
256 KB
512 KB
5 V RAM Only with the CPU 318-2
1 MB
2 MB

Siemens CPU 314 Specifications

General

Brand	Siemens
Model	CPU 314
Category	Controller
Language	English