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GetBit - method of the PmBuffer object

Description:
Reading the value of one bit.
Syntax:
Boolean GetBit(Long nOffset, Long nBitIndex)
Parameters:
nOffset(Long) Specifies 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.
>= 0 - Index (in bytes, zero-based index) in data block.
-4 - The internal automatic position is used (see the AutoOffset property). 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.
nBitIndex(Long) Bit index (zero-based index). The value must be any non-negative integer (it must define the position inside the data area range).
Note:
This method is also functional in Web panels.
See also:
- PmBuffer.SetBit (method)
- Pm.GetBit (method)
- PmVar.GetBit (method)
Example:
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var oBuf = Pm.CreatePmBuffer();
oBuf.SetInt8(-2, 0);
oBuf.SetBit(0, 0, true);
oBuf.SetBit(0, 1, true);
oBuf.SetBit(0, 2, false);
oBuf.SetBit(0, 3, true);

oBuf.AutoOffset = 0;
var bit0 = oBuf.GetBit(0, 0);
var bit1 = oBuf.GetBit(0, 1);
var bit2 = oBuf.GetBit(0, 2);
var bit3 = oBuf.GetBit(0, 3);

History:
Pm9.00.05: Created
PROMOTIC 9.0.17 SCADA system documentation - MICROSYS, spol. s r.o.

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