97BPLC concepts
4.5 Using a memory card
S7-1200 Programmable controller
100
System Manual, 11/2011, A5E02486680-05
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Use a transfer card to copy a program to the internal load memory of the CPU without
using STEP 7. After you insert the transfer card, the CPU first erases the user program
and any force values from the internal load memory, and then copies the program from
the transfer card to the internal load memory. When the transfer process is complete, you
must remove the transfer card.
You can use an empty transfer card to access a password-protected CPU when the
password has been lost or forgotten (Page 107). Inserting the empty transfer card deletes
the password-protected program in the internal load memory of the CPU. You can then
download a new program to the CPU.
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Use a program card as external load memory for the CPU. Inserting a program card in
the CPU erases all of the CPU internal load memory (the user program and any force
values). The CPU then executes the program in external load memory (the program
card). Downloading to a CPU that has a program card updates only the external load
memory (the program card).
Because the internal load memory of the CPU was erased when you inserted the
program card, the program card must remain in the CPU. If you remove the program
card, the CPU goes to STOP mode. (The error LED flashes to indicate that program card
has been removed.)
The program on a memory card includes the code blocks, the data blocks, the technology
objects, and the device configuration. The memory card does not contain any force values.
The force values are not part of the program, but are stored in the load memory, whether the
internal load memory of the CPU, or the external load memory (a program card). If a
program card is inserted in the CPU, then STEP 7 applies the force values only to the
external load memory on the program card.
You also use a memory card when downloading firmware updates from customer support
4.5.1
Inserting a memory card in the CPU
CAUTION
Electrostatic discharge can damage the memory card or the receptacle on the CPU.
Make contact with a grounded conductive pad and/or wear a grounded wrist strap when
you handle the memory card. Store the memory card in a conductive container.
Check that the memory card is not write-protected. Slide the protection
switch away from the "Lock" position.
