INVT Goodrive350-19 Series Operation Manual page 82

Goodrive350-19 Series VFD for Crane
Function
code
Forward brake release
P90.16
Reverse brake release
P90.17
Delay after forward brake
P90.22
Delay after reverse brake
P90.23
5.1.5 Commissioning the zero servo function
5.1.5.1 Zero servo function description
The zero servo function needs to be used in closed-loop vector control. During stop, the VFD checks
whether the pulse value is greater than P93.05. If yes, the VFD reports the holding brake failure alarm
A-bS, and the alarm can be configured with relay action output.
After reporting A-bS, it selects an action according to the ones place of P93.02 after the delay time
specified by P93.06 (if the pulse value during this period is greater than 3 times the value specified by
P93.05, this delay time is skipped:

If P93.02 ones place=1, the motor runs down slowly at the frequency specified by P93.03, after
the time specified by P93.04 elapses, the motor coasts to stop and performs detection again.
This process will be repeated.

If P93.02 ones place=2, the motor keeps zero speed running. This mode makes the motor locked
at the positioning function in stopped state. This means even if the motor is subjected to external
forces, the VFD keeps the motor unmoved and the load stopped at the position where it stops.

If P93.02 ones place=3, the motor keeps zero speed running for a period specified by P93.07,
and later it automatically switches to the zero speed slow lowering down mode.
When the motor runs in zero serve state, it can choose whether to exit according to the tens place
value of P93.02.
Name
frequency
frequency
release
release
Setting
You can increase it properly if sliding
0.70Hz
may occur at half the ramp.
You can increase it properly if sliding
0.70Hz
may occur at half the ramp.
Adjust it appropriately according to the
1.40s
holding brake action time.
Adjust it appropriately according to the
1.40s
holding brake action time.
-70-
Commissioning guidelines
Remarks