The S7-1500 uses SIMATIC memory cards as program memory.SIMATIC memory cards have the following main functions.
Acts as a loading storage area for the CPU, and the CPU cannot operate without the memory card.
Can be used to update the firmware version of the S7-1500 CPU and centralized IO modules.
Read service data.
Clearing item data from the memory card
Some cases require clearing the item data from the memory card.
When the set read/write protection password is forgotten and if the program needs to be downloaded again.
The current Protherm project version to be downloaded is lower than the project version in the memory card. For example, if the Protherm project version in the memory card is V16, but you need to download the V15 project currently, you may not be able to download it.
An unexpected termination occurs during the downloading process, such as a network interruption, which will cause the project in the memory card to be incomplete and TIA STEP7 can no longer connect to the CPU for downloading.
To clear the memory card project data.
Formatting via the CPU’s display
.
Format using TIA STEP 7.
Delete the project file using a commercially available SD card reader.
- Formatting via the CPU’s display
This method requires no additional hardware or software, but the firmware version of the CPU and display must be greater than or equal to V2.0. This method is suitable for cases where the read/write protection password is forgotten. The specific steps are as follows.
(1) Select Settings menu by the left and right arrow keys, and click OK to enter, as shown in Figure 1.
Translated with www.DeepL.com/Translator (free version)
Figure 1 Select to enter the Settings menu
(2) Select the Card handling menu item with the down arrow key and click OK to enter, as shown in Figure 2.
Figure 2 Select the menu item to enter Card handling
(3) Select the Format card menu item and click OK to enter, as shown in Figure 3.
Fig. 3 Select to enter Format card menu item
(4) Click OK button to confirm the formatting operation, and the PLC will enter STOP mode as shown in Figure 4.
Figure 4 Confirming the formatting operation
- Formatting with TIA STEP7
This method requires a computer with Protherm software installed and online connection to the CPU.
The procedure is as follows.
① Double click on “Online Access” in the project tree.
② Select your computer’s network card.
③ Double-click the “Update accessible devices” menu item.
④ Select the CPU you searched for.
⑤ Open the “Online and Diagnostic” view of the CPU.
⑥ Select “Format Memory Card” in the “Function” menu.
(7) Click “Format”.
⑧ Click “Yes” to confirm the prompt.
The above steps are shown in Figure 5.
Figure 5 TIA STEP7 formatting operation
- Use a commercially available SD card reader to delete project files
This method requires a computer and a commercially available SD card reader, and does not require Protherm software to be installed, and is suitable for cases where the read/write protection password is forgotten. The specific operation steps are as follows.
Insert the SIMATIC memory card into the SD card reader.
Open the card reader via Windows Explorer.
Delete the project data file as shown in Figure 6.
Figure 7 “Eject” memory card
Note: If your computer is set to show hidden files, you can also see the hidden system files, as shown in Figure 8, which cannot be deleted and are not allowed to format the memory card for windows.
Figure 8 Cannot delete system files
Review and edit: Liu Qing
