PLC concepts
5.5 Using a memory card
S7-1200 Programmable controller
144 System Manual, V4.2, 09/2016, A5E02486680-AK
6. In the "Load preview" dialog, click the "Load" button to copy the CPU device to the
memory card.
7. When the dialog displays a message that the CPU device (program) has been loaded
without errors, click the "Finish" button.
Verify that the CPU is not actively running a process before inserting the memory card.
Inserting a memory card will cause the CPU to go to STOP mode, which could affect the
operation of an online process or machine. Unexpected operation of a process or machine
could result in death or injury to personnel and/or property damage.
Before inserting a transfer card, always ensure that the CPU is in STOP mode and your
process is in a safe state.
Note
Do not insert V3.0 program transfer cards into later model CPUs.
Version 3.0 program transf
er cards are not compatible with later model S7-1200 CPUs.
Inserting a memory card that contains a V3.0 program causes a CPU error.
If you do insert an invalid version program transfer card, then remove the card, perform a
STOP to RUN transition, a memory
reset (MRES), or cycle power. After you recover the
CPU from the error condition, you can download a valid CPU program
To transfer the program to a CPU, follow these steps:
1. Insert the transfer card into the CPU (Page 139). If the CPU is in RUN, the CPU will go to
STOP mode. The maintenance (MAINT) LED flashes to indicate that the memory card
needs to be evaluated.
2. Power-cycle the CPU to evaluate the memory card. Alternative methods for rebooting the
CPU are to perform either a STOP-to-RUN transition or a memory reset (MRES) from
STEP 7.
3. After the rebooting and evaluating the memory card, the CPU copies the program to the
internal load memory of the CPU.
The RUN/STOP LED alternately flashes green and yellow to indicate that the program is
being copied. When the RUN/STOP LED turns on (solid yellow) and the MAINT LED
flashes, the copy process has finished. You can then remove the memory card.
4. Reboot the CPU (either by restoring power or by the alternative methods for rebooting) to
evaluate the new program that was transferred to internal load memory.
The CPU then goes to the start-up mode (RUN or STOP) that you configured for the project.
must remove the transfer card before setting the CPU to RUN mode.
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