Lenze DDS Function library MemDrv Manuel d'utilisateur télécharger pdf (Page 27)

Function library LenzeMemDrv.lib

Functions for RAM memory access

4.11 L_MemWriteWORD

4−13

LenzeMemDrv.lib EN 1.1

4.11 L_MemWriteWORD

INT. L_MemWriteWORD(wData, byRamBlockNr, wOffset)

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

wOffset

Block 1 (64KByte)

Block 2 (64 KByte)

RAM

byRamBlockNr

Block n (64 KByte)

Word

(16 Bit)

wData

Transfer parameters

Identifiers Data type Info/possible settings

wData Word Data value to be written (16 bits).

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

0 ... 65534 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 ... 65534).

−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 Manuel d'utilisateur Page 27