Lenze EVS93 Series, System Manual

Page: 114 / 386

Function library
Function blocks
3.2.22 Virtual clutch (CLUTCH1)
3−86
l
EDSVS9332K−EXT EN 4.0
3.2.22.1 Overload monitoring
The clutch function can be activated when overload occurs (e.g. torque overload).
Inputs for overload monitoring
l CLUTCH1−MACT
– Assign the actual value of the value to be monitored (e.g. MCTRL−MACT). The input signal is
processed as an absolute value.
l
CLUTCH1−OL−DET = HIGH (e.g. assign FIXED1). Activating the overload monitoring.
– CLUTCH1−OL−DET = LOW. Monitoring only sets the output CLUTCH1−OL = HIGH. No entry
is made in the history buffer!
l
CLUTCH1−MLIM
– Definition of the monitoring threshold
Overload monitoring is active if
l
CLUTCH1−MACT > CLUTCH1−MLIM
– Output CLUTCH1−OL = HIGH (irrespective of input CLUTCH1−OL−DET). The output remains
on HIGH until an L
→
H edge occurs at the input of CLUTCH1−CLOSE.
– The clutch is disengaged when CLUTCH1−OL−DET=HIGH.
)
Note!
Code C1412/3 is used to set a delay time which has to expire before the time when
the overload is indicated.
Monitoring will be reset if the load conditions go back to normal within the delay
time set.
3.2.22.2 Disengage clutch
In contrast to the mechanical clutch, the clutch function CLUTCH1 only causes the drive to be really
disconnected from the master value or profile shape. This serves to brake the drive to standstill in
a controlled way.
l
CLUTCH1−OPEN = HIGH (clutch open):
– Input CLUTCH1−CLOSE = LOW or
– Activation of the overload monitoring
l Speed control to standstill (CLUTCH1−NSET)
The output CLUTCH1−NSET provides a corresponding speed setpoint with which the drive is
decelerated to standstill.
The deceleration time can be set under C1412/1.