Plc Interface Signals For Gantry Axes - Siemens SINUMERIK 840D Function Manual

MD30455 $MA_MISC_FUNCTION_MASK, bit 9 = <value>
<Value> Meaning
9.6

PLC interface signals for gantry axes

Special IS for gantry axes
The special NC/PLC interface signals of the coupled gantry axes are taken via the axial NC/
PLC interface of the leading or synchronized axes. The table below shows all special gantry NC/
PLC interface signals along with their codes and indicates whether the IS is evaluated on the
leading axis or the synchronized axis.
NC/PLC interface signal
Start gantry synchronization
No automatic synchronization
Gantry axis
Gantry leading axis
Gantry grouping is synchronized
Gantry synchronization ready to
start
Gantry warning limit exceeded
Gantry trip limit exceeded
Effect of axial interface signals on gantry axes
a) Axial interface signals from the PLC to the axis (PLC → NC)
The axial interface signals from the PLC to the axis are always referred to all gantry axes in the
grouping. In this case, all gantry axes (leading and synchronized axis) have equal priority.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
0 When a fault occurs that triggers the pulse suppression (e.g. measuring-circuit fault), the
pulses in all other axes of the gantry grouping will also be suppressed.
Result: Coast down of all axes of the gantry grouping.
1 When a fault occurs that triggers the pulse suppression (e.g. measuring-circuit fault), the
pulses for only this axis will be suppressed. The other axes of the gantry grouping will be
stopped. The pulses for these axes are also then suppressed. To ensure that the pulses
these axes are not suppressed in advance, especially for axes to be held at the standstill
position (vertical axes), the following drive parameters must be taken into account:
● p1135[0...n] OFF3 ramp-down time
● p1217 holding brake application time
● p1227 zero speed detection monitoring time
● p1228 pulse suppression, delay time
For a detailed description of drive parameters, refer to:
Further information
SINAMICS S120/S150 List Manual
Direction of transfer
PLC → NC
PLC → NC
NC → PLC
NC → PLC
NC → PLC
NC → PLC
NC → PLC
NC → PLC
9.6 PLC interface signals for gantry axes
DB31, ... Leading axis
DBX...
29.4 X
29.5 X
101.7
101.6
101.5 X
101.4 X
101.3
101.2
G1: Gantry axes
Synchronous axis
1 1
1 0
X
X
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