 |
The Xentara Pickering PXI Driver v1.2
User Manual
|
|
The Xentara Pickering PXI Driver v1.2
User Manual
|
Precision resistor sub-units are Xentara I/O points that represent precision programmable resistor modules.
Each of the precision resistors is identified by a 1-based sub-unit number. Since precision resistors and output bits are both output sub-units, they share a common numbering. Input sub-units (which are currently not supported) have their own numbering.
Precision resistors have the following members:
| key | The resistor’s primary key. |
| name | The resistor’s name. The name is the last component of the primary key. |
| UUID | The unique UUID of the resistor. |
| type | The resistor’s element type. For precision resistors, this is always “Pickering PXI card precision resistor”. |
| category | The resistor’s category. For precision resistors, this is always “data point”. |
| bus | The logical bus location of the card that the resistor belongs to. |
| slot | The logical slot location of the card that the resistor belongs to. |
| subUnit | The 1-based sub-unit number of the resistor. |
| value | The current resistance value of the resistor, in Ω. This attribute can be written to change the resistance. |
| updateTime | The last time the resistor’s resistance value was read. |
| changeTime | The last time the resistor’s resistance value changed. |
| writeTime | The last time the a resistance value was written to the resistor. |
| quality | The quality of the resistor’s resistance 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 resistor’s resistance value was read. |
| writeError | The error that occurred the last time a resistance value was written to the resistor. |
| changed | This event is raised when either the value, the quality, or the error changes. |