M3: Axis Couplings; Signals To Axis (Db31; Signals From Axis (Db31 - Siemens SINUMERIK 840D sl Function Manual

Z3: NC/PLC interface signals

25.4 M3: Axis couplings

25.4 M3: Axis couplings
25.4.1

Signals to axis (DB31, ...)

DB31, ...
DBX26.4
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
25.4.2

Signals from axis (DB31, ...)

DB31, ...
DBX98.5
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Signal irrelevant ...
Corresponding to ...
DB31, ...
DBX98.6
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
812
Active following axis overlay
Signal(s) updated: Cyclic
An additional traversing motion can be overlaid on the following axis.
This signal is required for the flying synchronization of master and slave axes. Until the "enable
following axis overlay" signal stays set at 1, the following axis selected with EGONSYN will travel
to synchronization in the EG coupling.
Modulo axes included in the EG coupling reduce their position values in the modulo, thereby
ensuring that they approach the next possible synchronization.
The following axis cannot be overlaid and traversed.
If the "enable following axis overlay" signal has not been set for the following axis, the axis
will not travel to synchronization. Instead, the program is stopped at the EGONSYN block and
the self-clearing alarm 16771 is issued until the "enable following axis overlay" signal is set to
1.
Velocity warning threshold
Signal(s) updated: Cyclic
When the following axis velocity in the axis grouping of the electronic gear (set in machine
data MD32000) reaches or exceeds the velocity % block entered in machine data MD37550,
the signal is set to 1.
The following axis velocity in the axis grouping of the electronic gear is less than the threshold
value described above.
Without electronic gear.
the following machine data:
MD37550 $MA_EG_VEL_WARNING (threshold value velocity alarm threshold)
MD32000 $MA_MAX_AX_VELO (maximum axis velocity)
Acceleration warning threshold
Signal(s) updated: Cyclic
When the following axis acceleration in the axis grouping of the electronic gear (set in machine
data MD32300) reaches or exceeds the acceleration % block entered in machine data
MD37550, the signal is set to 1.
The following axis acceleration in the axis grouping of the electronic gear is less than the
threshold value described above.
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions