SetBuffer - method of the PmBuffer object

Writing data block in the form of PmBuffer.
Empty SetBuffer(Long nOffset, Object oBuff)
nOffset(Long) Defines the position of written value in the data block.

The whole written item muyst be inside the data block, or the whole item is added to the end of the data block. The item is written either whole or not read at all.

>= 0 - Index (in bytes, zero-based index) in data block.
-2 - The whole item is added to the end of the data block. The size of the data bloc is then increased by the written item.
-4 - 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 better to use this automated positioning.

oBuff(Object) Data block in the form of PmBuffer that is being written.
This method is also functional in Web panels.
See also:
JavaScriptSelect and copy to clipboard

var oBuf = Pm.CreatePmBuffer();
var s1 = "4030201060";
oBuf.SetHexaString(-2, s1);
var nSize = oBuf.GetBuffer();  //nSize = 7

var oBuf2 = Pm.CreatePmBuffer();
var s2 = "5070";
oBuf2.SetHexaString(-2, s2);

oBuf.SetSize(nSize + 2, true);
oBuf.SetBuffer(nSize, oBuf2);
var val = oBuf.GetHexaString();  //val = "40302010605070"

Pm9.00.04: Created
PROMOTIC 9.0.13 SCADA system documentation - MICROSYS, spol. s r.o.

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