Goodrive350-19 series VFD for crane
Basic operation guidelines
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c) The positioning length of spindle zeroing is determined by the deceleration time of accurate-stop
and the speed of accurate-stop;
(7) Spindle division operation
There are seven scale-division positions in P22, and you can choose one out of seven scale-division
positions by setting scale-division input terminal selection (48, 49, 50) in P05. Enable the
corresponding scale-division terminal after the motor stops accurately. Then the motor checks the
scale-division position state and switches to the corresponding position incrementally. You can check
P18.09.
(8) Priority level of speed control, position control and zeroing
The priority level of speed running is higher than that of the scale division, when the system runs in
scale-division mode, if spindle orientation is prohibited, the motor will turn to speed mode or position
mode.
The priority level of zeroing is higher than that of the scale division.
The scale-division command is valid when the scale-division terminal changes from 000 state to
non-000 state. For example, for the change from 000 to 011, the spindle executes scale division 3.
The transition time during terminal switchover needs to be less than 10ms; otherwise, an incorrect
scale division command may be executed.
(9) Hold positioning
The position loop gain during positioning is P21.03; while the position loop gain in
positioning-completion-hold state is P21.02. In order to keep sufficient position-hold force and ensure
no system oscillation occurred, adjust P03.00, P03.01, P20.05 and P21.02.
(10) Positioning command selection (bit6 of P22.00)
Electric level signal: Positioning command (zeroing and scale division) can be executed only when
there is running command or the servo is enabled.
(11) Spindle reference point selection (bit0 of P22.00)
Encoder Z pulse positioning supports the following spindle positioning modes:
a) the encoder is installed on the motor shaft, the motor shaft and spindle is 1:1 rigid connection;
b) the encoder is installed on the motor shaft, the motor shaft and spindle is 1:1 belt connection;
At this point, the belt may slip during high-speed running and cause inaccurate positioning, it is
recommended to install proximity switch on the spindle.
c) The encoder is installed on the spindle, and the motor shaft is connected to the spindle with belt,
the drive ratio is not necessarily 1:1;
at this time, you need to set P20.06 (speed ratio of the mounting shaft between motor and encoder),
and set P22.14 (spindle drive ratio) to 1. As the encoder is not installed on the motor, the control
performance of closed-loop vector will be affected.