January 2012 6.6 Reading and Writing Axis Information 681
Switching the
activation status
The activation status of an axis is switched through PLC Module 9226, and
that of the spindle through PLC Module 9418. It must be kept in mind that the
activation status cannot be increased beyond that configured in MP_axisHw.
An axis that is only displayed (MP_axisHw = DisplayMC or DisplayCC), for
example, cannot be switched up to the "manually operated axis" or "closed-
loop axis" activation status. The following table shows the permissible
changes of the activation status.
For example, proceed as follows if you want to activate individual axes without
rebooting:
Switch off the servo control of the motor.
Through Module 9226 for axes and 9418 for the spindle, use mode 14 to set
the motor to the "deactivated axis" activation status. This also deactivates all
monitors of the drive motor. Now the servo motor can be mechanically
removed, for example to exchange a milling head.
Reverse the sequence if you want to reactivate the previously deactivated
axis.
With Module 9226 or 9418, set the axis or spindle to the desired activation
status (mode 11 to 13)
The servo control of the motor can now be activated.
NN_AxLogNumber changes its value if you deactivate an axis with
Modules 9226 or 9418. NN_AxLogNumber is set to the value –1 for
deactivated axes. NN_AxLogNumber shows the current operating status of
the axis and therefore does not change immediately when the module is
called, but rather a little later.
Parameter
MP_axisHw
Permissible change of the activation status
Closed-loop
axis
Manually
operated
axis
Displayed
axis
Deactivated
axis
InOutCC
AnalogMC
AnalogCC
Profinet
XXXX
ManualMC
ManualCC
–XXX
DisplayMC
DisplayCC
––XX
After the axis is activated, the interpolator automatically conducts an
actual-to-nominal value transfer through mode 11 to 13.
Please note that activating a deactivated axis can take up to half a second.
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