HEIDENHAIN TNC 335 Technical Manual - Manual (Page 178)

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TNC 360 4 Spindle 4-81
MP3140 Count direction of the measuring system signals for the spindle
0 =positive count direction with M03
1 =negative count direction with M03
Set Reset
M2489 Change direction of spindle rotation PLC PLC
M2485 Status display and output of the analog voltage PLC PLC
for M03
M2486 Status display and output of the analog voltage PLC PLC
for M04
M2487 Status display M05 and spindle stop PLC PLC
M2608 Inverse display of M03, M04, M05 and PLC PLC
S analog = 0 V [no spindle-enable)
4.1.2 Gear range
With the aid of the machine parameters MP3510 and MP3210 up to eight gear ranges can be
defined. The nominal speed for S override 100 % and a matching S-analog voltage is entered for
each gear range.
If not all gear ranges are required, then the remaining machine parameters are set to zero.
Machine parameter MP3515 can be used to define a maximum achievable spindle speed for each
gear range which cannot be exceeded by S-override.
The voltage range can be restricted by machine parameter MP3240.1.
MP3120 can determine whether zero spindle speed is permitted, in spite of a minimum producable
analog output voltage.
If an S-analog voltage output 0 V is produced, marker M2005 will be set. This is also the case when
the potential has been turned down to zero with the override potentiometer.
The ramp slope for the S-analog voltage on output of M03, M04 is stored in MP3410.0.
If the spindle voltage is on a rising or falling ramp, marker M2004 will be set. This also happens
when the spindle voltage is altered with the override potentiometer, the voltage changes very
quickly, and the ramp of MP3410.0 cannot be followed.