Siemens SINUMERIK 840D sl Function Manual page 95

i.e. this channel must have the interpolation right for this axis. The axis is not requested from
another channel via axis replacement.
Referencing status
By setting a new actual value in the machine coordinate system, the referencing status of the
machine axis is reset.
DB31, ... DBX60.4/.5 = 0 (referenced/synchronized measuring system 1/2)
It is recommended that PRESETON only be used for axes that do not require a reference point.
To restore the original machine coordinate system, the measuring system of the machine axis
must be referenced again, e.g. through active referencing from the part program (G74).
Loss of the referencing status
By setting a new actual value in the machine coordinate system with PRESETON, the
referencing status of the machine axis is reset to "not referenced/synchronized".
Programming
Syntax
WHEN | EVERY ... DO PRESETON(<axis>,<value>)
Meaning
WHEN, EVERY:
PRESETON:
<axis>:
<value>:
System variable
$AC_PRESET
The axis-specific system variable $AC_PRESET provides the vector from the zero point of the
currently offset MCS' to the zero point of the original MCS
axis.
$AC_PRESET<axis> = $AC_PRESET<axis> + "current actual position of the axis in the MCS"
- "PRESETON actual position"
The work offset can be undone with the system variables:
Synchronized actions
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
CAUTION
Only WHEN and EVERY must be used as frequency (Page 17).
Actual value setting with loss of the referencing status
Machine axis name
Type:
Range of values: Machine axis names defined in the channel
New actual value of the machine axis in the machine coordinate system
(MCS)
The input is made in the current valid system of units (inch/metric)
An active diameter programming (DIAMON) is taken into account
Type:
3.7 Actions in synchronized actions
AXIS
REAL
after the referencing of the machine
0
Detailed description
95