Siemens SINUMERIK 840D Function Manual page 280

G1: Gantry axes
9.6 PLC interface signals for gantry axes
For example, all axes in the gantry groupings will be simultaneously shut down when the
following interface signal is set to "0" from the leading axis:
DB31, ... DBX2.1 (servo enable)
The following table shows the effect of individual interface signals (from PLC to axis) on gantry
axes:
NC/PLC interface signal
Axis/spindle disable
Position measuring system 1/2
Controller enable
Delete distance to go (axial)
Clamping in progress
Reference point value 1-4
Feed stop
Hardware limit switch plus/minus
2nd software limit switch plus/minus
Ramp-function generator fast stop (RFGFS)
Select drive parameter set
Enable Pulses
DB31, ... DBX1.5 and 1.6 (position measuring system 1/2)
1)
The switchover between position measuring systems 1 and 2 applies individually for each gantry axis. However, deactivation
of both position measuring systems (known as the parking position) applies as a common signal for all gantry axes.
DB31, ... DBX2.1 (controller enable)
2)
If the servo enable signal on one gantry axis is canceled, all axes in the gantry grouping are shut down simultaneously. The
method by which shutdown is implemented (e.g. with fast stop) is identical for all gantry axes.
Either the "Follow-up" state (IS of one gantry axis = 1) or the "Stop" state (IS of all gantry axes
= 0) is activated for all gantry axes, depending on interface signal:
DB31, ... DBX1.4 (follow-up mode)
b) Axial interface signals from the axis to the PLC (NC → PLC)
Each of the axial, axis-to-PLC interface signals for the synchronized axis and the leading axis
is always set on an axis-specific basis and output to the PLC.
Example:
DB31, ... DBX60.4 resp. 60.5 (referenced/synchronized 1/2).
Exception:
When the leading axis is traversed, the interface signal will also be set for the synchronizing
axis:
DB31, ... DBX64.6 and 64.7 (traverse command plus resp. minus)
280
DB31, ... DBX ... Effect on
Leading axis
1.3 On all axes in gantry
grouping
1.5 and 1.6 Axial
2.1 On all axes in gantry grouping
2.2 Axial
2.3 Axial
2.4 - 2.7 Axial
4.3 On all axes in gantry grouping
12.0 and 12.1 Axial alarm: Brake request on all axes in gantry
grouping
12.2 and 12.3 Axial
20.1 On all axes in gantry grouping
21.0 - 21.2 Axial
21.7 Axial
Synchronous axis
No effect
Axial
1) 1)
2)
No effect
Axial
Axial
Axial
Axial
Axial
Function Manual, 06/2019, A5E47437747B AA
Axes and spindles