NCK power
ON
Start-up end
09.95
ï›™
Siemens AG 2001 All Rights Reserved 6FC5197–jAA50
4–8
SINUMERIK 840C (IA)
NCK power ON without voltage failure.
Features:
S MD are activated.
S Reference point values are lost.
S PC 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:
S Following error in position control resolution (limit = 2 position control resolu-
tion units)
S Absolute actual value in position control resolution units
True position of the axes on the machine.
S Setpoint 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.
S Abs. compensation value
Sum of IKA and temperature compensations.
S Speed 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.
S Partial actual value in position control resolution units
Pulses per interpolation clock sent by the measuring system (standard 16
ms).
S Partial setpoint in position control resolution units.
Partial setpoints per interpolation time sent by the interpolator to the position
control (standard 16 ms).
S Contour 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).
S Synchronous run error
Deviation between leading axis and following axis.
S Parameter set position control.
4 MMC Area Diagnosis
4.1.4 Selection of the diagnosis area
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