Effectiveness Of Plc Interface Signals - Siemens SINUMERIK 840D Function Manual

Programming
Syntax:
Effectiveness:
Parameters:
Coupled motion
axis:
Leading axis:
Example:
Program code
TRAILOF(V,Y)
14.1.4

Effectiveness of PLC interface signals

Independent coupled motion axis
All the associated channel and axis specific interface signals of the coupled-motion axis are
effective for the independent motion of a coupled-motion axis, e.g.:
● DB21, ... DBX0.3 (Activate DRF)
● DB31, ... DBX0.0 - 0.7 (feedrate override)
● DB31, ... DBX1.3 (axis blocking)
● DB31, ... DBX2.1 (control system enable)
● DB31, ... DBX4.0 - 4.2 (activate handwheel)
● DB31, ... DBX4.3 (feed stop)
● ...
This allows the speed to be changed for the independent motion of a coupled motion axis using
a feedrate override or a DRF offset to be defined using the handwheel in AUTOMATIC and
MDA modes.
Dependent coupled motion axis
With respect to the motion of a coupled motion axis, which is dependent on the leading axis,
only the coupled-motion axis interface signals that effect termination of the motion (e.g. axis-
specific feed stop, axis inhibit, control system enable, etc.) are effective.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
TRAILON(<coupled motion axis>, <leading axis>)
TRAILOF(<coupled-motion axis>)
modal
Type: AXIS
Range of val‐ All defined axis and spindle names in the channel
ues:
Type: AXIS
Range of val‐ All defined axis and spindle names in the channel
ues:
Comment
; Deactivation of the coupling of the coupled-motion
; axis
V to leading axis Y.
M3: Coupled axes
14.1 Coupled motion
425