Jump out during monitoring. How can I resolve this command because the plc is uploading/downloading, in a fatal error state or missing hardware. If you are using a 32K memory card on a CPU with version Rel2.xx, make sure that the data retention settings area, mandatory values, database, and user program size are all within the range supported by the CPU version Rel1.xx.
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2, here to introduce the characteristics of the memory card:
About the memory card:
, 32K memory card: only used to store and transfer programs, data blocks and mandatory values.
, 64K/256K memory card: can be used for the new CPU (23 version) to save programs, data blocks and mandatory values, recipes, data records and other files (such as project files, pictures, etc.) The contents of the memory card will not be lost once written.
64K/256K new memory card can only be used for the new CPU (23 version); 32K memory card can only be used to transfer programs to the new version (23 version) CPU, does not support the new function of 64K/256K memory card; the new version of CPU can not Write any data to the 32K memory card.
When the CPU enters the power-on state, if the memory card is blank or a program of a different type of CPU is stored, an error will result. A high model CPU can read a memory card written with a low model CPU, and vice versa.
3. A typical problem:
Why does the SF (System Fault) error occur when copying a program to the S7-200CN using a new memory card version 23?
The 23 version of the memory card is fully compatible with the S7-200CNCPU and can be used on the SIMATICS7-200 with version 23 or higher, or on the S7-200CN.
In order to limit the use of the S7-200CNCPU by users outside of China, the transfer of the program from the SIMATIC CPU to the CNCPU via the memory card is restricted, ie the program cannot be transferred between the memory cards.
To transfer a program to the CNCPU via a memory card, the memory card must be programmed on the CNCPU.
To clear the SF error, you can use the menu command "PLC > Memory card erase" and then execute "PLC > Power-on reset".
