Lenze DDS Function library MemDrv Instrukcja Użytkownika Pobierz pdf (Strona 18)

4.3 L_MemCopyToRam

Function library LenzeMemDrv.lib

Functions for RAM memory access

4−4

LenzeMemDrv.lib EN 1.1

4.3 L_MemCopyToRam

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

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

block 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

pbyData Pointer to byte Pointer to the start address in the variable memory of the PLC from which on the data bytes to be

copied can be found.

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

byRamBlockNr Byte Selecting the RAM memory block to which the data bytes are to be copied

1 RAM memory 1, size: 64 kbytes

2 RAM memory 2, size: 64 kbytes

wOffset Word Destination address in the selected RAM memory block representing the start address for storing the

data bytes to be copied.

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

0 ... 65535 Destination address (offset)

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 33 34

Brak uwag

Lenze DDS Function library MemDrv Instrukcja Użytkownika Strona 18