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5.2 L_MemClearFlash

Function library LenzeMemDrv.lib

Functions for RAM memory access

5−2

LenzeMemDrv.lib EN 1.1

5.2 L_MemClearFlash

INT. L_MemClearFlash(byFlashBlockNr)

This function can be used to erase a memory segment from the Flash memory of the PLC.

· After erasing the selected memory segment, all data in this segment have the value FF

hex

· The function is processed at the same time as the PLC program in the system task. This is

why the processing time depends on the workload of the system.

· You can use the function L_MemGetStateDriver to find out if erasing has been completed.

Segment 1 (64KByte)

Segment 2 (64KByte)

Segment n (64KByte)

byFlashBlockNr

FLASH

CLEAR

hex

Transfer parameters

Identifiers Data type Info/possible settings

byFlashBlockNr Byte Selecting the Flash memory segment to be erased.

1 Flash memory segment 1, size: 64 kbytes

... ...

15 Flash memory segment 15, size: 64 kbytes

Return value: Integer

Value Meaning

0 Erase request has been successfully transferred to the operating system.

−40 Copy job has not been transferred to the operating system since the copy driver is still processing the previous memory

management function.

−50 Copy job has not been transferred to the operating system since the memory is presently accessed

(e. g. via codes).

−55 Flash write protection has been activated; access denied.

−65 Erase request has not been transferred to the operating system since the transfer parameters are faulty:

byFlashBlockNr is invalid.

−80 Function is not supported by the operating system.

Example

Calling the function in ST:

(* clear FLASH segment 2 *)

nReturn := L_MemClearFlash(byFlashBlockNr := 2);

(* check function return value *)

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Lenze DDS Function library MemDrv Manuale Utente Pagina 30