See also: xentara_io_points in the Xentara user manual

Output bit sub-units are Xentara I/O points that represent simple switch sub-units and multiplexer sub-units. This inculdes the voltage reference and monitor sub-units of output programmable bit modules.

Each of the output bit is identified by a 1-based sub-unit number and a bit number. Since output bits and precision resistors are both output sub-units, they share a common numbering. Input sub-units (which are currently not supported) have their own numbering.

Accessing Output Bits

See also: Accessing Xentara Elements in the Xentara user manual

Output bits have the following members:

Attributes

key	The bit’s primary key.
name	The bit’s name. The name is the last component of the primary key.
UUID	The unique UUID of the bit.
type	The bit’s element type. For output bits, this is always “Pickering PXI card output bit”.
category	The bit’s category. For output bits, this is always “data point”.
bus	The logical bus location of the card that the bit belongs to.
slot	The logical slot location of the card that the bit belongs to.
subUnit	The 1-based sub-unit number of the bit.
bitNumber	The 1-based bit number of the bit within the sub-unit.
value	The current value of the bit, in Ω. This attribute can be written to operate the bit. A value of ON is represented by true, and a value of OFF by false.
updateTime	The last time the bit’s value was read.
changeTime	The last time the bit’s value changed.
writeTime	The last time the bit was operated.
quality	The quality of the bit’s value. See Data Quality in the Xentara user manual for an explanation of a data point’s quality.
error	The error that occurred the last time the bit’s value was read.
writeError	The error that occurred the last time the bit was operated.

Events

changed This event is raised when either the value, the quality, or the error changes.