Siemens SINUMERIK 840D sl Function Manual page 301

Pulse enable
The pulse enable or pulse inhibit can be canceled via:
● Drive: Via terminal EP (enable pulses)
● NC/PLC interface signal: DB31, ... DBX21.7 ("pulse enable")
The behavior at the fixed stop can be set via the following machine data:
MD37002 $MA_FIXED_STOP_CONTROL, bit 0 and bit 1 (sequence control for traversing to
fix stop)
Bit
0
1
Special case: Deleting the pulse enable during deselection
If, during deselection, the function in state: "Waiting for PLC acknowledgements" the pulse
enable is deleted, the torque limit is reduced to 0. In this phase, if pulse enable is set again
torque is no longer established in the drive. Once the deselection has been completed the axis
can be traversed normally again.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Val‐ Meaning
ue
Behavior for pulseinhibit at the fixed stop
0 "Travel to fixed stop" is aborted
1 "Travel to fixed stop" is interrupted, i.e. the drive is without power.
Behavior for pulseenable at the fixed stop
0 The torque is injected suddenly.
1 The torque is linearly ramped-up over the time specified in the machine data:
MD37012 $MA_FIXED_STOP_TORQUE_RAMP_TIME
F1: Travel to fixed stop
6.2 Detailed description
301