Control Response Of Plc-Controlled Axes - Siemens SINUMERIK 840D Function Manual

P2: Positioning axes
6.7 Control by the PLC
6.7.3

Control response of PLC-controlled axes

Response for a channel reset, activate machine data, block search and MD30460
Table 6-1
Control response to
Mode change and NC program control
Channel RESET
NEWCONF
Block search Type 5 SERUPRO
All block search variants
of types 1, 2, 4 and 5
NC-controlled retraction activated with
$AC_ESR_TRIGGER.
machine data:
MD30460 $MA_BASE_FUNKTION_MASK
Bit 4 = 0
Bit 4 = 1
MD30460 $MA_BASE_FUNKTION_MASK
Bit 6 = 1
Bit 7 = 1
* Note on axis replacement
This replacement of a "neutral axis" by an "NC program axis" does not take place until the PLC
has really relinquished control of the axis in accordance with use case "Relinquish control of
axis". Waiting for this axis interchange is displayed on the HMI operator panel front.
216
PLC-controlled axis
work independently of axis.
No axial machine data are effective and a travers‐
ing movement is not aborted.
No axial machine data are effective.
are processed during SERUPRO to simulate the
normal procedure, e.g. PLC takes over or relin‐
quishes control of this axis which is also traversing
via the PLC.
The PLC takes over control of the axis before the
approach block and is responsible for positioning
this axis.
has no effect and acts only on the specified PLC-
controlled axis.
which is not controlled
exclusively by the PLC
cannot be changed directly with axis replacement
command GET (axis) or AXTOCHAN(axis, chan‐
nel) to an axis controlled by the NC program, see *
Note on axis replacement.
cannot be requested for the NC program. GET or
AXTOCHAN from the NC program or a synchron‐
ized action, or programming the axis in the NC
program, are rejected with alarm 26075.
For the PLC-controlled axis
channel-specific
IS DB 21, ... DBX6.0 ("feed disable") is not effec‐
tive. This axis is not stopped when feed disable is
activated, but continues to move.
the axis is not taken into account when
IS DB 21, ... DBX36.3 ("all axes stationary") is
generated. This signal is output with 1 even if all
other axes in the channel are stationary and only
the PLC-controlled axis is active.
Function Manual, 06/2019, A5E47437747B AA
Axes and spindles