CDHD Application Setup
User Manual 149
Va rCom Descr iption
UNI TSROTVEL The units of velocity variables in a rotary system .
UNI TSROTACC
The units of acceleration and deceleration variables in a
rot ary system .
UNI TSLI NPOS The units of position variables in a linear system
UNI TSLI NVEL The units of velocity variables in a linear system.
UNI TSLI NACC
The units of acceleration and deceleration variables in a
linear system .
PNUM
Conversion factors of the user-defined unit. They are used
to multiply the motor revolution (rotary m otors) or the
m ot or pitch ( linear m ot ors) , according t o the t ype of m ot or
(MOTORTYPE).
PDEN
FBGDS
The conversion factor of the fieldbus device’s dr ive shaft
revolution.
FBGMS
The conversion factor of the fieldbus device’s ge a r shaft
revolution.
6 .8 Current Foldback
The current foldback is a mechanism used by CDHD to protect the drive and
mot or from overheating due to excessive current. Current foldback is set
independently for the drive and for the m ot or.
Current foldback limits the root mean square (rms) value of current to the drive
and/ or the m ot or.
When the motor is select ed from the ServoStudio Mot or Library, current
foldback param eters are pre-set and written to the drive. These parameters are
m anufacturer-defined and should not be manipulated by the user; if you want to
m ake any changes t o these param eters, contact Technical Support.
Use the ServoStudio Cu r re n t Foldba ck task screen for viewing and configuring
m otor and drive foldback parameters.
The following param eters are used to monitor and manipulate foldback
properties.
Va rCom D e script ion
I FOLD Drive foldback current
DI CONT Drive continuous current
I FOLDFTHRESH Drive foldback fault threshold
I FOLDWTHRESH Drive foldback warning threshold
DI PEAK Drive peak current
MI FOLD Motor foldback current
MI CONT Mot or continuous current
MI FOLDFTHRESH Motor foldback fault threshold
MI FOLDWTHRESH Mot or foldback warning threshold
MI PEAK Motor peak current
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