Detailed descriptions of interface signals
4.8 Axis / spindle-specific signals
Parameter Manual
384
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Signal state 0 "Controller enable" will be/is removed.
The interface signals:
DB390x DBX1.5 (position controller active)
DB390x DBX1.6 (speed controller active)
DB390x DBX1.7 (current controller active)
are set to a 0 signal.
The procedure for removing "controller enable" depends on whether the
axis / spindle or an axis of the geometry grouping is stationary or traversing
at this point in time.
• Axis / spindle stationary:
– Position control loop of axis is opened.
For IS "follow-on mode" = 1, the position actual value is switched to
the position setpoint (i.e. the position setpoint tracks the actual
position). The position actual value of the axis / spindle continues to
be acquired by the control.
– The controller enable of the drive is removed.
• Axis / spindle traverses:
– The axis is stopped with rapid stop.
– Alarm 21612 "VDI signal controller enable reset during movement" is
output.
– The position control loop of the axis / spindle is opened.
– Independent of IS: "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 "Follow-up mode" is set.
The axis status cannot be changed again until after RESET.
Application Using the controller enable when clamping the axis:
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When clamping is to be withdrawn again, a controller enable signal is first
set again and then the axis is freed from clamping.
Special cases, errors, ... If an attempt is made to traverse the axis without controller enable, the axis
remains stationary but sends a travel command to the PLC. The travel
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 ... MD36620 SERVO_DISABLE_DELAY_TIME (switch-off delay controller
enable)
MD36610 AX_EMERGENCY_STOP_TIME (time for braking ramp when
fault conditions occur)
Note for the reader Function Manual Basic Functions G2
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