GetBuffer - method of object PmBuffer

Reading the data block in the form of PmBuffer.
Object GetBuffer(Long nOffset, [Long nSize])
Value = PmBuffer.GetBuffer(nOffset, nSize)
nOffset(Long) Defines the position of read value in the data block. The read value must be inside the data block. The item is read either whole or not read at all.
The value -4 means that the internal automatic position is used (see AutoOffset). It points behind the last read or written value and increases continually. If the items are read/written one by one then it is not necessary to define the position, but it is handy to use this automated positioning.
nSize[optional] (Long) The size of read data block. The value -1 (default) means that the data block is read from the defined starting position to the end.
Return Values:
The method returns new object PmBuffer containing the read data block.
This method is also functional for Web panels.
See also:

Pm9.00.04: Created
PROMOTIC 9.0.4 SCADA system documentation - MICROSYS, spol. s r.o.

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