Data Item Types: SAMPLE
From MTConnect® User's Portal
Data Item type/subtype  Description  Units 

ACCELERATION 
Rate of change of velocity  MILLIMETER/SECOND^2

ACCUMULATED_TIME 
The measurement of accumulated time associated with a Component  SECOND

ANGULAR_ACCELERATION 
Rate of change of angular velocity  DEGREE/SECOND^2

ANGULAR_VELOCITY 
Rate of change of angular position  DEGREE/SECOND

AMPERAGE 
The measurement of AC Current or a DC current  AMPERE

ALTERNATING 
The measurement of alternating current. If not specified further in statistic, defaults to RMS Current  AMPERE

DIRECT 
The measurement of DC current  AMPERE

ANGLE 
The angular position of a component relative to the parent  DEGREE

ACTUAL 
The angular position as read from the physical component  DEGREE

COMMANDED 
The angular position computed by the Controller  DEGREE

AXIS_FEEDRATE 
The feedrate of a linear axis  MILLIMETER/SECOND

ACTUAL 
The measured value of the federate of a linear axis  MILLIMETER/SECOND

COMMANDED 
The feedrate as specified by the controller. This is a calculated value that includes adjustments and overrides  MILLIMETER/SECOND

JOG 
The feedrate specified by a logic or motion program, by a preset value, or set by a switch when operating in a manual state or method (jogging)  MILLIMETER/SECOND

PROGRAMMED 
The feedrate specified by a logic or motion program or set by a switch  MILLIMETER/SECOND

RAPID 
The feedrate specified by a logic or motion program, by a preset value, or set by a switch when operating in a rapid positioning mode  MILLIMETER/SECOND

OVERRIDE 
DEPRECATED in REL 1.3. See EVENT Type DataItems   
CLOCK_TIME 
The reading of a timing device at a specific point in time. Clock time MUST be reported in W3C ISO 8601 format  YYYYMMDDThh:mm:ss.ffff

CONCENTRATION 
Percentage of one component within a mixture of components  PERCENT

CONDUCTIVITY 
The ability of a material to conduct electricity  SIEMENS/METER

DISPLACEMENT 
The displacement as the change in position of an object  MILLIMETER

ELECTRICAL_ENERGY 
The measurement of electrical energy consumption by a component  WATT_SECOND

FILL_LEVEL 
The measurement of the amount of a substance remaining compared to the planned maximum amount of that substance  PERCENT

FLOW 
The rate of flow of a fluid  LITER/SECOND

FREQUENCY 
The measurement of the number of occurrences of a repeating event per unit time  HERTZ

LENGTH 
The length of an object  MILLIMETER

STANDARD 
The overall length of an object  MILLIMETER

REMAINING 
The remaining length of an ojbect  MILLIMETER

USEABLE 
The useable length of an object  MILLIMETER

LINEAR_FORCE 
The measure of the push or pull introduced by an actuator or exerted on an object  NEWTON

LOAD 
The measurement of the percentage of the standard rating of a device  PERCENT

MASS 
The measurement of the mass of an object(s) or an amount of material  KILOGRAM

PATH_FEEDRATE 
The feedrate for the axes associated with a Path  may represent a single axis or multiple axes  MILLIMETER/SECOND

ACTUAL 
The measured value of the feedrate  MILLIMETER/SECOND

COMMANDED 
The feedrate as specified by the Controller type component. This is a calculated value that includes adjustments and overrides  MILLIMETER/SECOND

JOG 
The feedrate specified by a logic or motion program, by a preset value, or set by a switch when operating in a manual state or method (jogging)  MILLIMETER/SECOND

PROGRAMMED 
The feedrate specified by a logic or motion program or set by a switch  MILLIMETER/SECOND

RAPID 
The feedrate specified by a logic or motion program, by a preset value, or set by a switch when operating in a rapid positioning mode  MILLIMETER/SECOND

OVERRIDE 
DEPRECATED in REL 1.3. See EVENT Type DataItems  

PATH_POSITION 
The current program control point or program coordinate in WORK coordinates. The coordinate system will revert to MACHINE coordinates if WORK coordinates are not available  MILLIMETER_3D

ACTUAL 
The position of the Component as read from the device  MILLIMETER_3D

COMMANDED 
The position computed by the Controller  MILLIMETER_3D

TARGET 
The target position for the movement  MILLIMETER_3D

PROBE 
The position provided by a probe  MILLIMETER_3D

PH 
The measure of the acidity or alkalinity  PH

POSITION 
The position of the Component. Defaults to MACHINE coordinates  MILLIMETER

ACTUAL 
The position of the Component  MILLIMETER

COMMANDED 
The position as given by the Controller  MILLIMETER

TARGET 
The target position for the movement  MILLIMETER

POWER_FACTOR 
The measurement of the ratio of real power flowing to a load to the apparent power in that AC circuit  PERCENT

PRESSURE 
The force per unit area exerted by a gas or liquid  PASCAL

RESISTANCE 
The measurement of the degree to which an object opposes an electric current through it  OHM

ROTARY_VELOCITY 
The rotational speed of a rotary axis  REVOLUTION/MINUTE

ACTUAL 
The measured rotational speed the rotary axis is spinning at  REVOLUTION/MINUTE

COMMANDED 
The rotational speed as specified by the Controller. This value includes adjustments and overrides  REVOLUTION/MINUTE

PROGRAMMED 
The rotational speed specified by a log or motion program or set by a switch  REVOLUTION/MINUTE

OVERRIDE 
DEPRECATED in REL 1.3. See EVENT Type DataItems  

SOUND_LEVEL 
Measurement of a sound level or sound pressure level relative to atmospheric pressure  DECIBEL

NO_SCALE 
No weighting factor on the frequency scale  DECIBEL

A_SCALE 
A Scale weighting factor. This is the default weighting factor if no factor is specified  DECIBEL

B_SCALE 
B Scale weighting factor  DECIBEL

C_SCALE 
C Scale weighting factor  DECIBEL

D_SCALE 
D Scale weighting factor  DECIBEL

SPINDLE_SPEED 
DEPRECATED in REL 1.2. Replaced by ROTARY_VELOCITY   
ACTUAL 
The rotational speed of a rotary axis. ROTARY_MODE MUST be SPINDLE  REVOLUTION/MINUTE

COMMANDED 
The rotational speed the as specified in the program  REVOLUTION/MINUTE

OVERRIDE 
The operator’s overridden value. Percent of commanded  PERCENT

STRAIN 
Strain is the amount of deformation per unit length of an object when a load is applied  PERCENT

TEMPERATURE 
The measurement of temperature  CELSIUS

TILT 
A measurement of angular displacement  MICRO_RADIAN

TORQUE 
The turning force exerted on an object or by an object  NEWTON_METER

VOLT_AMPERE 
The measure of apparent power in an electrical circuit  VOLT_AMPERE

VOLT_AMPERE_REACTIVE 
The measurement of reactive power in an AC electrical circuit  VOLT_AMPERE_REACTIVE

VELOCITY 
The rate of change of the position of a componenet  MILLIMETER/SECOND

VISCOSITY 
The measurement of a fluid's resistance to flow  PASCAL_SECOND

VOLTAGE 
The measurement of electrical power between two componenets  VOLT

ALTERNATING 
The measurment of alternating current voltage  VOLT

DIRECT 
The measurement of direct current voltage  VOLT

WATTAGE 
The measurement of power consumed or dissipated by an electrical circuit or device  WATT
