Lenze DDS Function library MemDrv Uživatelský manuál stáhnout pdf (Strana 16)

4.2 L_MemCopyFromRam

Function library LenzeMemDrv.lib

Functions for RAM memory access

4−2

LenzeMemDrv.lib EN 1.1

4.2 L_MemCopyFromRam

INT. L_MemCopyFromRam(byRamBlockNr, wOffset, pbyData, wLength)

This function can be used to copy data from a RAM block of the PLC byte by byte to the variable

memory of the PLC.

· 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 copying has been completed.

Variable memory (RAM)

pbyData

wLength

wOffset

Block 1 (64KByte)

Block 2 (64 KByte)

RAM blocks

byRamBlockNr

Block n (64 KByte)

Transfer parameters

Identifiers Data type Info/possible settings

byRamBlockNr Byte Selecting the RAM memory block including the bytes to be copied

1 RAM memory 1, size: 64 kbytes

2 RAM memory 2, size: 64 kbytes

wOffset Word Start address in the RAM memory block for the data bytes to be copied

· The start address must not be higher than 65535 − wLength.

0 ... 65535 Start address (offset)

pbyData Pointer to byte Pointer to the destination address in the variable memory of the PLC where the data bytes are to be

copied.

wLength Word 1 ... 8192 Number of data bytes to be copied

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 33 34

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Lenze DDS Function library MemDrv Uživatelský manuál Strana 16