Goodrive350-19 series VFD for crane
Commissioning guidelines
-81-
Function
code
Name
Description
Default
P90.34
Enabling speed reference under
brake status error
0
–1
0: Disable (The brake feedback fault
is reported.)
1: Enable (The brake feedback alarm
is also reported.)
0
P90.35
Speed reference under brake
status error
0.00
–50.00Hz
5.00Hz
P90.37
Brake selection for
forward/reverse switchover
0
–1
0: No switchover
1: Switchover
0
P93.00
Brake slip speed threshold
1.00
–5.00Hz
1.00Hz
P93.01
Brake slip fault delay
0.000
–5.000s
The value 0 indicates brake slip is not
detected, while a non-zero value
indicates brake slip is detected.
0.500s
5.11.5 Brake function in torque control
If brake control (P90.04=1) is enabled when the torque mode is used (P03.32=1), the braking logic in
the torque mode is enabled. When the VFD runs, the set torque is set based on (P90.42+5.0%). The
FWD/REV frequency upper limit in the torque mode is given by the FWD/REV brake release
frequency, and the output torque is detected in real mode. If the output torque is equal to or greater
than the preset brake opening torque (P90.42), a delay before brake release is performed. When the
delay is reached, brake output is performed. Then a delay after brake release is performed. When the
delay is reached, the brake timing ends. The set torque and the FWD/REV frequency upper limit in
the torque mode are restored to the normal values. That is, the parameters in P03 determine that the
VFD runs in the normal torque mode.
During stop, the VFD automatically switches from the torque mode to the speed mode and then
decelerates to stop. Then the brake logic uses the brake closing logic in the speed mode.
The brake timing diagram is as follows: