Function library
Function blocks
9.2.27 Digital frequency ramp function generator (DFRFG)
9-109
L
EDSVS9332S-D11 EN 3.0
9.2.27.7 Correction of the touch probe initiator (terminal X5/E5)
Delay times during the activation of the initiator cause a speed-dependent phase offset (e.g. during
positioning, synchronising).
z Set correction value for the phase offset under C0429.
z Formula for correction value:
Correction value C0429 = 16384 × correction value
z
You can take the correction value from the data sheet of the initiator or contact the
manufacturer.
9.2.27.8 Offset setting
The offset can be set with the code C0756 (see chapter 9.4; code list). The offset refers to the digital
frequency input and is scaled to one revolution (≙65536 increments).
Thetouch probe(TP)initiates thestart oftheramp functiongenerator.Theleading of themaster drive
from the moment of starting or the resulting path/phase difference is taken up during the acceleration
phase.
z Setting: positive offset values
– Causes a time shift of the TP
– This means that less time is necessary - compared to the setting with e.g. offset = 0 - to
obtain synchronism with the master drive.
Tip!
With high offsets and low input speeds the drive may reverse. To avoid this, a direction of rotation
can be selected for the output via C0766.
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