and contains the commands and functions necessary to communicate with the instrument. You can use the software module entry data to locate the component on your system and determine what instrument models and class interfaces (called Published APIs in the configuration server) are supported by the component.

HardwareAsset: A HardwareAsset describes a specific physical device in your system with which you communicate such as an oscilloscope or power supply. The HardwareAsset includes a resource descriptor – a string that specifies the I/O interface and address of a hardware asset, such as GPIB::23::INSTR.

DriverSession: A DriverSession provides the information needed to use a driver in a particular context. It makes the association between a SoftwareModule and a HardwareAsset. It defines a set of properties for use by IVI instrument driver software modules, such as initial configurable settings for attributes, virtual name mappings, and simulation settings. You can configure a DriverSession for each instrument, for each of its possible I/O resource descriptors, and for each program that uses it.

LogicalName: A LogicalName is a configurable pointer to a particular DriverSession. Application programs use logical names to avoid direct references to software modules and hardware assets. In a typical setup, the application communicates with an instrument via a logical name. If the application needs to communicate with a different instrument (for example, the same kind of scope at a different location), only the logical name within the IVI Configuration Store needs to be updated to point to the new driver session. You don’t need to rewrite any code in the application, because it uses the same logical name.

The illustration below shows how the IVI Configuration Store enables interchangeability. The application is developed and makes calls via the logical name. In the illustration, this is shown as DMM. The actual DMM is from Vendor X at address GPIB1::21::INSTR and uses the Vendor X DMM IVI-COM driver. In the Configuration Store, the logical name DMM is associated with a Driver Session that is configured to the specific information of the Vendor X DMM.

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HP Drive manual Advanced Topics

Drive specifications

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