Siemens SINUMERIK 840Di Function Manual page 1898

Detailed Description
2.1 Various interface signals and functions (A2)
DB31, ...
DBX2.1 Controller enable
Application Using controller enable when clamping the axis:
example(s)
The axis is positioned to the clamping position. As soon as it has stopped it is clamped and then
controller enable is removed. Controller enable is removed because the axis could be mechanically
pressed out of position slightly by clamping and the position controller would continuously have to
work against the clamping.
When clamping is to be stopped, a controller enable signal is first set again and then the axis is
freed from clamping.
Special cases, If an attempt is made to traverse the axis/spindle without controller enable, the axis/spindle remains
errors, .... stationary but sends a traversing/move command to the PLC (axis only). The traversing/move
command is kept and is executed when the controller enable is re-activated.
If the controller enable of a traversing geometry axis is removed the programmed contour cannot be
maintained.
Controller enable is automatically cancelled by the control when certain faults occur at the machine,
the position measuring system or the control.
Corresponding to .... DB31, ... DBX61.3 (follow-up mode 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 (switch-off delay 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
Signal state 1 or Delete distance-to-go (axis-specific):
edge change
Depending on the operating mode, the following occurs for IS "delete distance-to-go axial":
0 → 1
•
•
Note: IS "Delete distance-to-go" does not influence the running dwell time in a program block with
dwell time.
Signal state 0 or No effect
edge change
1 → 0
Application To terminate motion because of an external signal (e.g. measuring probe)
example(s)
2-34
Signal(s) updated: cyclic
In the JOG mode:
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 removed.
For AUTOMATIC and MDA:
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.
NC/PLC Interface Signals (Z1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0