Formatting A Simatic Memory Card From Step 7 - Siemens SIMATIC S7-1200 System Manual

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Online and diagnostic tools

15.7 Formatting a SIMATIC memory card from STEP 7

Formatting a SIMATIC memory card from STEP 7

You can format the memory card in a connected CPU from the STEP 7 online and diagnostic

tools. To do so, follow these steps:

1. Ensure the CPU is in STOP mode. Note that if the CPU is in RUN mode and you start a

formatting operation, STEP 7 prompts you to allow STEP 7 to put the CPU in STOP

2. Insert a memory card into the connected CPU.

3. Open Online & diagnostics for the connected CPU from either the CPU in the project or

from the accessible devices in Online access in the project tree.

4. If the CPU is not online, select "Go online" for the connected CPU.

5. Select "Format memory card" from the "Functions" menu.

6. Click "Format".

7. Confirm the prompt with "Yes".

STEP 7 then formats the memory card and displays a message in the Info window when

complete. The CPU is in STOP at the completion of the format operation with the STOP and

MAINT lights blinking. You cannot go to RUN mode at this point; you must take one of the

following actions:

● Remove the memory card and restart the CPU: If the internal load memory of the CPU

contains a program, the CPU starts with the program.

● Restart the CPU without removing the memory card: If the internal load memory of the

CPU contains a program, the CPU copies it to the memory card and starts with that

program. If the internal load memory has no program, the CPU changes the memory card

to a Program card (Page 145) and waits for a download.

Formatting a memory card has no effect on the contents of internal load memory.

If the CPU was using internal load memory when you inserted the memory card and you did

not restart the CPU between inserting the card and executing the format operation, the CPU

retains the contents of internal load memory.

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK