Siemens SINUMERIK 840D sl Function Manual page 1574

Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
DB31, ...
DBX2.1
Controller enable
Application exam‐ Mechanical clamping of an axis
ple(s)
If the axis is positioned at the clamping position, the clamping is closed. The controller enable is then
reset. Otherwise, the position controller would constantly work against the clamping, if the axis was
moved mechanically from its specified position during the clamping operation.
When the clamping is removed, the controller enable is set first and then the mechanical clamping is
released.
Special cases,
● Travel request for an axis/spindle without controller enable:
errors, ....
● When the controller enable is reset for a traversing geometry axis, this always results in a contour
Corresponding to ... DB31, ... DBX61.3 (follow-up active)
DB31, ... DBX1.4 (follow-up mode)
DB31, ... DBX61.5 (position controller active)
DB31, ... DBX61.6 (speed controller active)
DB31, ... DBX61.7 (current controller active)
MD36620 $MA_SERVO_DISABLE_DELAY_TIME (OFF delay of the controller enable)
MD36610 $MA_AX_EMERGENCY_STOP_TIME (braking ramp time when errors occur)
DB31, ...
DBX2.2
Delete distance-to-go (axis-specific) / spindle reset
Edge evaluation: Yes
Edge change Delete distance-to-go (axis-specific) is requested.
0 → 1
The behavior varies depending on the operating mode:
● JOG mode:
● AUTOMATIC and MDA modes:
Remark: "Delete distance-to-go" does not influence the running dwell time in a part program block
with dwell time.
Edge change No effect
1 → 0
Application exam‐ To terminate motion because of an external signal (e.g. measuring probe)
ple(s)
1574
– The axis/spindle is not traversed
– The travel command is output to the interface
– As long as the travel request is present, the axis/spindle is traversed immediately when the
controller enable is set.
violation.
Signal(s) updated: Cyclically
If the interface signal is set for one axis (edge change 0 → 1), this axis is stopped with ramp stop
and its distance-to-go deleted (setpoint - actual value difference).
Any remaining following error is then corrected.
The rising edge of the interface signals only influences the axes which are not in the geometry
grouping. They are stopped with ramp stop and their distance-to-go deleted (setpoint - actual
value difference). The next program block can then be started. IS "delete distance-to-go axial" is
therefore ignored by geometry axes.
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions