Computer Drive Installation Instructions

NCK power

Start-up end

09.95



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