Siemens SINUMERIK 840D sl Function Manual page 2048

Detailed Description
2.1 Various interface signals and functions (A2)
DB31, ...
DBX93.7 Pulses enabled
Edge evaluation: no
Signal state 1 or The pulse enable for the drive module is available. The axis/spindle can now be traversed.
edge change
0 → 1
Signal state 0 or The drive module pulses are suppressed. Therefore, the axis/spindle cannot be traversed.
edge change
The pulses are suppressed as soon as there is no enable signal (refer to Fig.).
1 → 0
Also, if the "controller enable of drive" is withdrawn, the drive is stopped with setpoint 0
(regenerative braking).
A timer is started in the drive module and after the configured time has expired:
MD1404 $MD_PULSE_SUPPRESSION_DELAY (timer stage, pulse suppression),
the pulses are inhibited.
If, within this time, the actual speed reaches the shutdown speed:
MD1403 $MD_PULSE_SUPPRESSION_SPEED (pulse suppression),
then at this time, the pulses are inhibited.
If the speed is less than/equal to the speed threshold (MD1403), and if the controller enable of the
drive is withdrawn, then the pulses are immediately suppressed.
Pulse suppression is also triggered if there is no position measuring system ("parking axis" state).
As soon as the pulses are suppressed, then also the interface signals:
DB31, ... DBX61.7 (current controller active)
and
DB31, ... DBX61.6 (speed controller active)
are reset.
Pulse enable for 611D drive module
52
Signal(s) updated: cyclic
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0