Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual - Manual (Page 313)

Publication 1784-UM003A-EN-P – June 2003
Motion Object Attributes 305
Acceleration Feedback Acceleration Feedback is the actual velocity of the axis as estimated by the
servo module, in the configured axis Position Units per Second
2
. The
Estimated Acceleration is calculated by taking the difference in the Estimated
Velocity over the servo update interval. Acceleration Feedback is a signed
value—the sign (+ or -) depends on which direction the axis is currently
moving.
Servo Output Level Servo Output Level is the current voltage level of the servo output of the
specified axis. The Servo Output Level can be used in drilling applications, for
example, where the servo module is interfaced to an external Torque Loop
Servo Drive, to detect when the drill bit has engaged the surface of the work
piece.
Marker Distance Marker Distance is the distance between the axis position at which a home
switch input was detected and the axis position at which the marker event was
detected. This value is useful in aligning a home limit switch relative to a
feedback marker pulse to provide repeatable homing operation.
GSV/SSV Access Attribute Name Data Type Values
GSV Acceleration Feedback REAL
Position Units / Sec
2
GSV/SSV Access Attribute Name Data Type Values
GSV Servo Output Level REAL Volts
GSV/SSV Access Attribute Name Data Type Values
GSV Marker Distance REAL Position Units