NCK power
ON
Start-up end
09.95
Siemens AG 2001 All Rights Reserved 6FC5197–jAA50
4–8
SINUMERIK 840C (IA)
NCK power ON without voltage failure.
Features:
SMD are activated.
SReference point values are lost.
SPC data are not updated.
Terminate the machine data dialog (MDD).
4.2 NC Service
For drive optimization and error diagnosis it is necessary to check the data trans-
mitted from the NC to the axes or spindles and from the axis or spindles to the
NC.
The following service data for axes are displayed:
SFollowing error in position control resolution (limit = 2 position control resolu-
tion units)
SAbsolute actual value in position control resolution units
True position of the axes on the machine.
SSetpoint in position control resolution units
Default which has been determined by the control system on the basis of pro-
gramming or setpoint position entered manually.
Normally, setpoint and absolute actual value are identical. In standstill, the
difference (following error) can be compensated with the drift compensation.
SAbs. compensation value
Sum of IKA and temperature compensations.
SSpeed setpoint in 0.01 % of the maximum speed
Digital value which has been determined by the control system (maximum
value see NC-MD 268*). This is converted into an analog value (0 V to 10 V)
on the measuring circuit module and output as speed setpoint to the drive.
SPartial actual value in position control resolution units
Pulses per interpolation clock sent by the measuring system (standard 16
ms).
SPartial setpoint in position control resolution units.
Partial setpoints per interpolation time sent by the interpolator to the position
control (standard 16 ms).
SContour monitoring
The current contour deviation is displayed with this value (fluctuations of the
following error due to adjustments on the speed controller caused by settling
due to load changes).
SSynchronous run error
Deviation between leading axis and following axis.
SParameter set position control.
4 MMC Area Diagnosis
4.1.4 Selection of the diagnosis area