Siemens SINUMERIK 828D Function Manual page 1631

DB31, ...
DBX2.1 Controller enable
Signal state 1 or When "controller enable" is set by the PLC user program:
edge change
•
0 → 1
•
•
•
When "controller enable" has been signaled no new actual value synchronization of the axis
(reference point approach) of the axis is necessary if the maximum permissible limit frequency of the
axis measuring system has not been exceeded during follow­up mode.
As a function of the interface signal:
DB31, ... DBX1.4 ( follow­up mode)
it is possible to select whether or not the axis first traverses back to the earlier setpoint position (i.e.
the positional deviation caused by the clamping process is moved through to eliminate the
deviation).
Edge change "Controller enable" will be/is removed:
1 → 0 or
The procedure for removing "controller enable" depends on whether the axis/spindle or an axis of
signal state 0
the geometry grouping is stationary or traversing at this point in time.
•
•
The axis status cannot be changed again until after RESET.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Position control loop of axis is closed.
Position actual value is no longer switched to the position setpoint.
The controller enable of the drive is output.
The interface signal:
DB31, ... DBX61.5 (position controller active)
is set to 1.
Axis/spindle stationary:
– Position control loop of axis is opened.
– When IS "Follow-up mode" = 1 the position actual value is switched to the position setpoint
(i.e. the setpoint position is corrected to the actual value position). The position actual value
of the axis/spindle continues to be acquired by the control.
– The controller enable of the drive is removed.
– The interface signals:
DB31, ... DBX61.5 (position controller active)
DB31, ... DBX61.6 (speed controller active)
DB31, ... DBX61.7 (current controller active)
are set to 0.
Axis/spindle traverses:
– The axis is stopped with rapid stop.
– Alarm 21612 "VDI signal controller enable reset during movement" is triggered.
– The position control loop of the axis/spindle is opened.
– Independent of the interface signal:
DB31, ... DBX1.4 (follow-up mode)
At the end of braking the position actual value is switched to the position setpoint
(i.e. the setpoint position is corrected to track the actual value position).
The position actual value of the axis/spindle continues to be acquired by the control.
IS "Follow­up mode" is set.
– The interface signals:
DB31, ... DBX61.5 (position controller active)
DB31, ... DBX61.6 (speed controller active)
DB31, ... DBX61.7 (current controller active)
are set to 0.
Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
1631