HEIDENHAIN TNC 306 Technical Manual - Manual (Page 491)

1/98
TNC406/TNC 306 1-3
= K+0
JPT 791
;KEY WAS PROCESSED
SN M980 ;SET: WAIT FOR PROCESSING
LBL 791
EM
LBL 795 ;ERROR HANDLING KEY SIMULATION
EM
LBL 799
PS K+0
;ASK WHETHER KEY HAS BEEN SIMULATED
CM 9180
PLW
= K+0
R M980
;KEY PROCESSED
R M2813
EM
M980 and W240 can be replaced by any free markers/words. M2813 and W516 no longer evaluate
the PLC.
1.2 New and Changed Markers and Words
M2826 added: Disable handwheel feed rate
M2826 disables the feed rate of the handwheel.
M2552 and following changed: Actual position capture
With markers M2552 and following you can capture an actual value as a nominal value with clamped
axes and at the same time monitor the limit switches. This permits the servo lag to be set to 0 for
an axis that has been taken out of the control loop with the clamping markers 2492 and following,
and 2544 and following. Up to now these markers were active only in manual operation. Now they
are effective for every clamped axis regardless of the control operating mode.
D748 added: Free rotation of a second angular axis
If the 5th axis has also been defined as angle axis (A or B), you can switch on the free rotation of
this axis (behavior is similar to ROT-C) by loading the PLC doubleword D748 with the speed value
(e.g. 10 000 for 10 rpm). By loading a negative value you can reverse the direction of rotation. An M
function as with ROT-C is not required.
W490 added: Control temperature
The PLC word W490 contains the control temperature in degrees Celsius.
PLC functions keys A,B,C on the HR 410
The three PLC function keys on the HR 410 are now effective in all operating modes.
2. New Functions for the Control Loop and for Commissioning
Higher resolution in the position control loop
The previous resolution of 1 µm for the internal position values has been increased to 1/16 µm. This
enables more exact positioning and gap control. The entire control loop has been redeveloped and
the calculation of the feedforward voltage for gap control has been completely redesigned. Also, a
filter was integrated that is automatically activated for eight control loop cycles if a step in the
feedforward voltage is too large.