Lenze 520 series Technische Beschreibung Seite 62

60
Caution! If the drive accelerates uncontrolled. immediately operi switch RFR.
Possible causes could be:
a) Tacho Une disconnected
b) Short-circuit of tacho signal
reverse
c) No
If the speed
~
Set speed reference to maximum.
Turn trimmer nmax clockwise, until the desired speed is reached.
Turn trimmer ~
-
Then turn trimmer ~
Set speed reference to 0V.
-
Compensate a possible offset speed via trimmer n 0ff.
-
polarity between referen~e 8nd
is stable after checking the actual value signal and new
enable( the maximum speed can be
clockwise, until the drive becomes instable (speed oscillations).
counterclockwise, until the drive is stable again.
4Q
DC Chopper 520 series
-
actual value
Set.
Lenze