Siemens SINUMERIK 840D sl Function Manual page 600

TE1: Clearance control - 840D sl only
15.9 Supplementary conditions
Displaying the axis position
The actual current axis position of a clearance-controlled axis as the sum of an interpolatory
axis position and the current position offset of clearance control is not displayed in the main
machine screen:
● SINUMERIK HMI Advanced:
The actual current axis position is displayed in the Service screen: Operating area
switchover > Diagnosis > Service displays > Axis/spindle displayed as the "actual position
value".
● SINUMERIK Operate:
The actual current axis position is displayed in the Service screen: Operating area
switchover > Diagnosis > Axis dialog > Service axis > displayed as the "measuring system
1 and 2 actual position value".
No virtual axes
Clearance-controlled axes must not be parameterized as virtual axes:
MD30132 $MA_IS_VIRTUAL_AX[<axis>] (axis is virtual axis)
Computing time requirements
The additional computing time required for the "clearance control" technological function must
be taken into account on control systems in which the cycle times set for the interpolator and
position controller cycle have been substantially optimized in comparison with the default
setting:
The additional required computing time results after the activation of the clearance control in
the CLC( ... ) part program. If the interpolation or position controller cycle is exceeded,
the following alarm appears:
● Interrupt: "4240 Computing time overflow at IPO or position controller level, IP
program "
Execution of the part program is aborted.
1D clearance control function
Alarm "1016: System error, ID550010" can occur in the following situation:
● The clearance-controlled axis (e.g. Z axis) is parameterized as geometry axis
● Within any command sequence in which STOPRE is initiated implicitly or explicitly, the
clearance control with CLC(0) is switched off
We therefore recommend that the clearance-controlled axis of a 1D clearance control function
(e.g. Z axis) is parameterized so that it is no geometry axis of the channel.
Machine data
● MD20050 $MC_AXCONF_GEOAX_ASSIGN_TAB[<Z axis>] = 0
● MD20060 $MC_AXCONF_GEOAX_NAME_TAB[<Z axis>] = "NO_Z_AXIS"
600
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
point in part
Special functions