Siemens SINUMERIK 828D Function Manual page 271

Position reference value
compensation value meas.
system 1 or 2
Sag and temperature
compensation
Velocity actual value of active
encoder (only 840Di)
Velocity setpoint of drive (only
840Di)
Speed actual value
Speed setpoint
Spindle speed setpoint prog.
Spindle speed setpoint current
Override
Position offset for master axis/
spindle actual value
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Specified position transferred from the interpolator to the position
control.
Unit: mm, inch or degrees
Display of absolute compensation value for measuring system 1 or
2.
The compensation value consists of the sum of backlash and
leadscrew error compensation for the actual axis position
Unit: mm, inch or degrees
Display of the compensation value calculated for the current axis
position based on the total of the sag and temperature
compensations.?
Unit: mm, inch or degrees
Display of velocity actual value of the currently active encoder.
Display of velocity setpoint of drive.
The pulses supplied by the encoder are evaluated by the NC and
displayed.
Unit: %
100% means maximum speed.
Speed setpoint transferred to the drive (= speed setpoint from
position controller and feed forward control).
Unit: %
100% means maximum speed setpoint
Speed setpoint programmed by the user.
Unit: rpm
e.g.: Input: S1000; display: 1000 rpm
Display applies to spindles only.
Current active speed setpoint with correct sign, including calculated
compensation value and any operative speed limitation
(programmed by means of setting or machine data).
Unit: rpm
Display applies to spindles only.
The effective correction factor of the feed or spindle correction
switch is displayed.
Unit: %
The currently applicable position offset value is displayed here
(relative to the actual value) if such a position offset (angular offset
between master and slave axes) has been programmed for the
"Synchronous spindle" function.
Unit: mm, inches, degrees
References:
Function Manual Extension Functions, Synchronous Spindle (S3)
D1: Diagnostics tools
5.3 Service overview
271