Individual bit from OPC INT

[Oz_Ba]

Hi,

I am trying to read specific bit of OPC server item which is VT_I2.

If I create Advanced OPC Analog 16bit Integer point I get good quality decimal value.

What I need is individual value of specific bit, 1st, 2nd...7th.

How do I achieve this? 

I tried creating Advanced OPC Digital point Boolean type and tried reading specific array element.

No success.

Any suggestion is appreciated.

[AndrewScott · Accepted solution]

If you create an Advanced OPC Digital Point and set the "Data Type" to "16-bit Integer", the "Number of Bits" to 1 and the "Bit Offset" to the required bit (0 to 15) then it will extract the required individual bit from the integer value.

[Oz_Ba]

@AndrewScott 

As simple as that! I´m pretty new to GeoScada, I´m still learning.

I was mislead by these ARRAY type of data types.

Many thanks.

[Anonymous user · Accepted solution]

ClearSCADA Advanced OPC driver with OFS tested and confirmed a Digital Point configured with ItemID.bit offset also works.

[UWCS]

It does not work with multi-bits when doing a write (Control method write to byte value) from ClearSCADA to PLC (M580). Example: Bits=2, bit offset=10. Instead it always writes to Bits 0 & 1 of the corresponding PLC word.