Application
1. Switching over from
position measuring system 1 to position measuring
system 2 (and vice versa):
If the axis was referenced in both position measuring systems and in the
meantime, the limit frequency of the measuring encoder used was not
exceeded, i.e. IS "Referenced/synchronized 1/2" has a signal state 1,
then after the switchover, a new reference point approach is not required.
At switchover, the actual difference between position measuring system
1 and 2 is traversed immediately.
Using MD36500 ENC_CHANGE_TOL, a tolerance bandwidth can be
specified in which the deviation between the two actual values may lie at
the switchover. If the actual value difference is greater than the tolerance,
a switchover between the two systems does not take place and alarm
25100 "Measuring system switchover" not possible is triggered.
2. Parking axis (i.e. no PMS is active:
If the encoder has to be removed - e.g. if a rotary table has to be removed
from the machine - the position measuring system monitoring is switched
off in the parking position.
The mounted axis / spindle encoder turns so quickly in certain
applications that it can no longer maintain its electrical characteristics
(edge rate-of-rise, etc.).
3. Switching-off the measuring system:
When the measuring system is switched-off, the associated IS
"Referenced/synchronized 1/2" is reset.
4. Reference point approach:
The reference point approach of the axis is executed with the selected
position measuring system.
Special cases, errors, ... If the "parking axis" state is active, then the interface signal "Referenced/
synchronized 1/2" is ignored at NC start for this axis.
corresponding to ... DB390x DBX0.4/.5 (referenced/synchronized 1/2)
DB380x DBX2.1 (controller enable)
MD36500
ENC_CHANGE_TOL (max.
tolerance for the actual position value
switchover)
MD30200 NUM_ENCS (number of encoders)
Note for the reader Function Manual Basic Functions G2
DB380x
DBX1.7
Override active
Signal(s) to axis / spindle (PLC → NCK)
Edge evaluation: No Signal(s) updated: Cyclic
Signal state 1 Feedrate override active (for axes):
●
The axis-specific feedrate override between 0 and a maximum of 120%
entered in the PLC interface is used.
Spindle override active (for spindle):
● The spindle override - input at the PLC interface - of 50 to a maximum of
120% is taken into account.
Detailed descriptions of interface signals
5.8 Axis / spindle-specific signals
Parameter Manual
410 Parameter Manual, 08/2015, 6FC5397-8EP40-0BA1
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