Lenze DDS Function library MemDrv Uživatelský manuál stáhnout pdf (Strana 25)

Function library LenzeMemDrv.lib

Functions for RAM memory access

4.9 L_MemWriteDWORD

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LenzeMemDrv.lib EN 1.1

4.9 L_MemWriteDWORD

INT. L_MemWriteDWORD(dwData, byRamBlockNr, wOffset)

This function can be used to write the value of a variable of type "double word" into a RAM block of

the PLC.

wOffset

Block 1 (64KByte)

Block 2 (64 KByte)

RAM

byRamBlockNr

Block n (64 KByte)

Double Word

(32 Bit)

dwData

Transfer parameters

Identifiers Data type Info/possible settings

dwData Double word Data value to be written (32 bits).

byRamBlockNr Byte Selecting the RAM memory block into which dwData is to be written.

1 RAM memory 1, size: 64 kbytes

2 RAM memory 2, size: 64 kbytes

wOffset Word Destination address in the selected RAM memory block to which dwData is to be written.

0 ... 65532 Destination address (offset)

· Only even values are permissible as offset!

Return value: Integer

Value Meaning

0 Write request completed.

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

byRamBlockNr is invalid.

−35 Copy job has not been transferred to the operating system since the transfer parameters are faulty:

wOffset is an odd address or a value beyond the permissible range (0 ... 65532).

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

(e. g. via codes).

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Lenze DDS Function library MemDrv Uživatelský manuál Strana 25