·102·
Installation manual
CNC 8060
CNC 8065
2.
MACHINE PARAMETERS.
(REF: 1402)
Machine parameters for the axes and spindles.
FBACKSRC
Feedback type.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for a Sercos drive.
Possible values: Internal / External / Internal+External.
Default value: Internal.
Associated variable: (V.)[ch].MPA.FBACKSRC.xn
Parameter included in the SERCOSDATA table.
Type of feedback used to close the position loop. Refer to the drive manual for further detail.
When using internal feedback, the position value is taken from motor feedback whereas
when using external feedback, it is taken from direct feedback. When using internal+external
feedback, the feedback may be swapped via PLC using the FBACKSEL(axis) mark.. When
using external or internal+external feedback, we recommend setting parameter
FBACKDIFF.
When the type of feedback is external or internal+external, the CNC can enable the
combined feedback; parameter FBMIXTIME.
When the type of feedback is internal+external, the CNC uses the internal feedback (motor
feedback) on power-up, when resetting the drive and when initializing the Sercos ring.
Tandem axes do not admit the internal+extenrnal type of feedback. In a tandem axis, both
axes must have the same type of feedback, external or internal, but usually, the master axis
uses external feedback and the slave axis the internal one.
FBACKDIFF
Maximum difference between feedbacks.
Parameter valid for linear and rotary axes.
Parameter valid for a position-Sercos drive.
Possible values: Within ±99999.9999 mm or degrees / within ±3937.00787 inch.
Default value: 0 (no monitoring).
Associated variable: (V.)[ch].MPA.FBACKDIFF.xn
Parameter included in the SERCOSDATA table.
The CNC takes this parameter into account only on axes with external or external+internal
feedback.
When the system has dual feedback, this parameter may be used to monitor the difference
between both feedbacks. If the difference exceeds the set value, the CNC will display the
corresponding error message. When defined with a "0" value, there will be no monitoring.
ULTRAIPO
(Not being used at this time)
Parameter not being used at this time.
FBACKSRC FBMIXTIME Type of feedback.
Internal (Not being used) Internal feedback.
External 0 External feedback.
External Value greater than ·0·. The combined (mixed) feedback is active.
Internal+External 0 The feedback type may be swapped from the PLC
using the mark FBACKSEL(axis). Internal or
external feedback.
Internal+External Value greater than ·0·. The feedback type may be swapped from the PLC
using the mark FBACKSEL(axis). Internal feedback
or combined (mixed) feedback.
To Next Page
Loading...
