Meaning of the error codes for DB backup to flash

FAQ #101284

 

Read Flash Status

Reads the Flash status and stores it in the ACCU and a Register with a SYSRD

SYSRD	K 3000	;for PCD with FlashCard
	K 3100	;for PCD Onboard Flash (PCD3 and PCD2.M5)

Result

• If the ACCU is set Low and the return value in the register is 0 --> OK
• If the return value in the register is not 0 --> please refer to the list of status bits below for the reason why the flash can not be used.
• If the ACCU is set High  --> if the Flash is busy and SYSWR was not executed.

The Error Flag is set if there is an error. See status bits for details. The destination register contains the status bits (description below)

Status bits

Bit	Description	Cause
0	No flash	No flash is fitted
1	No header config	There is no header/user program copied on the Flash Card
2	SYSWR not enabled	The DB/Text mode is not enable (memory allocation)
3	DB/Text does not exist	Incorrect DB/Text number
4	DB/Text size is not equal	DB/Text size is different, has been changed
5	Restored	DB/Text on FlashCard were restored because an error was detected
6	Buffer full	To much DB/Text are saved, memory is full
7	Already started	Last SYSWR command was not finished before a new one  was started (For PCD3 and PCD2.M5 please read FAQ 101466, too)
*8	Flash error	No backup DB is configured on the flash or on the SRAM.  Impossible to access the flash, the bit is updated during  the "initializing backup" or the "copying DB to flash. (For PCD3  and PCD2.M5 please read FAQ 101466, too)
*9	Flash busy	Another job is working on flash
*10	DB size error	DB size is zero. The bit is updated during the backup and restore DB
11..15	Not used
*16	Header different	The "User Program Backup Size" of the Flash is different from SRAM. The bit is updated during the "initializing backup" process.
*17	No flash card	Flash card is not present. The bit is updated during the "initializing backup" process.
*18	No flash free	The "User Program Backup Size" >= "User flash size". The bit is updated during the "initializing backup" process.
19...31	(for future use)

* not used by PCD2/4/M170