base class, extends NXobject


A generic positioner such as a motor or piezo-electric transducer.


No symbol table

Groups cited:



@default: (optional) NX_CHAR

Declares which child group contains a path leading to a NXdata group.

It is recommended (as of NIAC2014) to use this attribute to help define the path to the default dataset to be plotted. See https://www.nexusformat.org/2014_How_to_find_default_data.html for a summary of the discussion.

name: (optional) NX_CHAR

symbolic or mnemonic name (one word)

description: (optional) NX_CHAR

description of positioner

value[n]: (optional) NX_NUMBER {units=NX_ANY}

best known value of positioner - need [n] as may be scanned

raw_value[n]: (optional) NX_NUMBER {units=NX_ANY}

raw value of positioner - need [n] as may be scanned

target_value[n]: (optional) NX_NUMBER {units=NX_ANY}

targeted (commanded) value of positioner - need [n] as may be scanned

tolerance[n]: (optional) NX_NUMBER {units=NX_ANY}

maximum allowable difference between target_value and value

soft_limit_min: (optional) NX_NUMBER {units=NX_ANY}

minimum allowed limit to set value

soft_limit_max: (optional) NX_NUMBER {units=NX_ANY}

maximum allowed limit to set value

velocity: (optional) NX_NUMBER {units=NX_ANY}

velocity of the positioner (distance moved per unit time)

acceleration_time: (optional) NX_NUMBER {units=NX_ANY}

time to ramp the velocity up to full speed

controller_record: (optional) NX_CHAR

Hardware device record, e.g. EPICS process variable, taco/tango …

Hypertext Anchors

Table of hypertext anchors for all groups, fields, attributes, and links defined in this class.

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