Siemens SINUMERIK 840D sl Function Manual page 220

H1: Manual and handwheel travel
4.13 Use of handwheels in automatic mode
Handwheel weighting
The traverse path of the axis that is generated by rotating the handwheel by one detent position
is dependent on several factors (see Section "Handwheel travel (Page 165)"):
● Selected increment size:
MD11330 $MN_JOG_INCR_SIZE_TAB[5] (increment size for INC/handwheel)
or
SD41010 $SN_JOG_VAR_INCR_SIZE (size of the variable increment for JOG)
● Weighting of an increment:
MD31090 $MA_JOG_INCR_WEIGHT
● Number of handwheel pulses per detent position:
MD11320 $MN_HANDWH_IMP_PER_LATCH
For example, the axis traverses by 0.001 mm per handwheel detent position if machine function
INC1 and the default setting of the above machine data are selected.
In the case of velocity override, the velocity results from the traverse path covered using the
handwheel within a certain period of time.
Example
Assumptions:
The operator turns the handwheel with 100 pulses/second.
The selected machine function is INC100.
The default setting is made for the above machine data for handwheel weighting.
⇒ Handwheel traverse path per second:
⇒ Velocity override:
PLC interface signals
As soon as the handwheel override takes effect, the following interface signals to the PLC are
set to signal 1:
● For positioning axes / concurrent positioning axes / command axes / reciprocating axes:
DB31, ... DBX62.1 (handwheel override active)
● For path axes:
DB21, ... DBX33.3 (handwheel override active)
For the path input, depending on the traversing direction, the appropriate interface signals are
output to the PLC:
● Machine axes:
– DB31, ... DBX64.6/7 (traversing command minus/plus)
● Geometry axes:
– DB21, ... DBX40.6/7 (geometry axis 1: traversing command minus/plus)
– DB21, ... DBX46.6/7 (geometry axis 2: traversing command minus/plus)
– DB21, ... DBX52.6/7 (geometry axis 3: traversing command minus/plus)
220
10 mm
0.6 m/min
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions