4 – 48 HEIDENHAIN Technical Manual TNC 426, TNC 430
4.3.13 Tapping
MP Function and input Software 
version and 
behavior
Page
MP7110.0 Minimum for feed rate override during tapping
Input: 0 to 150 [%]
PLC
RUN
6 – 207
MP7110.1 Maximum for feed rate override during tapping
Input: 0 to 150 [%]
6 – 207
MP7120.0 Dwell time for reversal of spindle rotational direction
Input:  0 to 65.535 [s]
PLC
RUN
6 – 207
MP7120.1 Advanced switching time of the spindle during tapping with 
coded spindle-speed output
Input:  0 to 65.535 [s]
6 – 208
MP7120.2 Spindle slow-down time after reaching the hole depth
Input:  0 to 65.535 [s]
6 – 207
MP7130 Run-in behavior of the spindle during rigid tapping
Input: 0.001 to 10 [°/min]
PLC 6 – 211
MP7150 Positioning window of the tool axis during rigid tapping
Input: 0.0001 to 2 [mm]
PLC 6 – 211
MP7160 Spindle response during Cycle 17 and 18
Format: %xxxx
Input: Bit 0 – Oriented spindle stop with Cycle 17
0: Before execution of Cycle 17
spindle orientation
1: Before execution of Cycle 17 no
spindle orientation
Bit 1 – Spindle speed
0: Spindle speed is not limited
1: Spindle speed is limited so that 
  about 1/3 of the time the spindle runs at constant
speed
Bit 2 – Spindle in position feedback control
0: Spindle operated without position feedback
control
1: Spindle operated with position feedback
control
Bit 3 – IPC and acceleration feedforward control
0: Active
1: Not active
PLC, CN123
RUN
6 – 211