User Manual

PLC concepts made easy
4.4 Memory areas, addressing and data types
Easy Book
Manual, 03/2014, A5E02486774-AF
59
An optional SIMATIC memory card provides an alternative memory for
storing your user program or a means for transferring your program. If you
use the memory card, the CPU runs the program from the memory card
and not from the memory in the CPU.
Check that the memory card is not write
-protected. Slide the protection
switch
away from the "Lock" position.
Use the optional SIMATIC memory card as a program card, as a transfer card, for collecting
data log files, or to perform a firmware update.
● Use the transfer card to copy your project to multiple CPUs without using STEP 7. The
transfer card copies a stored project from the card to the memory of the CPU. You must
remove the transfer card after copying the program to the CPU.
● The program card takes the place of CPU memory; all of your CPU functions are
controlled by the program card. Inserting the program card erases all of the internal load
memory of the CPU (including the user program and any forced I/O). The CPU then
executes the user program from the program card.
● You can also use the program card for collecting data log files (Page 112). The program
card provides more memory than the internal memory of the CPU. The Web server
function (Page 193) of the CPU allows you to download the data log files to a computer.
● You can also use a memory card to perform a firmware update. Refer to the S7-1200
System Manual for instructions.
Note
The program card must
remain in the CPU. If you remove the program card, the CPU goes
to STOP mode.