INVT Goodrive350-19 Series Operation Manual page 98

Goodrive350-19 series VFD for crane
detection again and repeats the preceding steps, which are cyclical. If P93.02=3, the hold time is
specified by P93.38. When the set time is reached, the zero servo input slows down.
Note:

At certain faults that cannot be reset, such as VFD internal hardware damaged, zero servo
cannot be entered. At the faults that can be reset, with zero servo conditions met, zero servo
can be entered.

Every time zero servo is exited, torque verification is not performed only at the first running
command giving, which means the verification is performed at all the following running command
giving.

When P93.02=2, the motor becomes hot, the fan cannot be mounted at the same shaft as the
motor, and it must be independently controlled.
One zero servo period consists of the brake detection, brake failure alarm protection input delay, and
slow lowering processes.
Zero servo slow lowering mode
The zero servo slow lowering process )(P93.02=1) is as follows:
Y
N Y
Fault?
N
Hardware fault?
Zero-servo run
Run or jog command?
Y
N
P93.07 = 1 is true?
Y
Exit zero-servo run
-86-
Stop
N
Stop detection
pulses > P93.05?
Fault reset
Y
Down command?
Y
Stop
Commissioning guidelines