Lenze DDS Function library MemDrv Uživatelský manuál stáhnout pdf (Strana 33)

Function library LenzeMemDrv.lib

Functions for RAM memory access

5.4 L_MemSaveRamToFlash

5−5

LenzeMemDrv.lib EN 1.1

5.4 L_MemSaveRamToFlash

INT. L_MemSaveRamToFlash(byRamBlockNr, byFlashBlockNr)

This function can be used to save the data of a whole RAM block of the PLC permanently in a Flash

memory segment of the PLC.

· Before saving data, the function erases the selected Flash memory segment (overwrites it with

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 data saving has been

completed.

Block 1 (64KByte)

RAM

byRamBlockNr

Block 2 (64KByte)

Segment 1 (64KByte)

Segment 2 (64KByte)

Segment n (64KByte)

byFlashBlockNr

FLASH

Block n (64KByte)

Transfer parameters

Identifiers Data type Info/possible settings

byRamBlockNr Byte Selecting the RAM memory block to be saved

1 RAM memory 1, size: 64 kbytes

2 RAM memory 2, size: 64 kbytes

byFlashBlockNr Byte Selecting the Flash memory segment in which the data of the selected RAM block are to be

permanently saved.

1 Flash memory segment 1, size: 64 kbytes

... ...

15 Flash memory segment 15, size: 64 kbytes

Return value: Integer

Value Meaning

0 Copy job 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.

−60 Copy job has not been transferred to the operating system since the transfer parameters are faulty:

byRamBlockNr is invalid.

−65 Copy job 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.

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