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apfiff09 marine VACON®
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7.15.3 Closed Loop settings
7.15.3.1 Start Up torque
The start-up torque is used to generate torque against the brake so that when the brake is
mechanically opened, there will be no position change because the drive is already generating the
torque needed to keep the load in place.
Settings the start-up torque time is set to -1 means that the start-up torque is removed when the
drive notices encoder movement. Setting the time greater than 0 will denote the actual time for how
long the start-up torque is applied to the motor even if the motor shaft is already rotating thus making
the motor accelerate without control until time has expired.
P2.15.12.1 CL: Startup torque ID621
“StartUp Torque!
0 = Not Used
1 = Torque Memory
Torque memory uses the torque that was used by the speed controller last time the drive
was in running state. Normally, this is the torque generated when the zero speed time at
stop has expired and the drive has stopped modulation or started the flux off delay
function.
2 = Torque Reference
The normal torque reference chain is used (expect TorqueStep) for the start-up torque
level. This can be used when the external system knows the load on the shaft when
brake is released.
3 = Torque Forwad/Reverse
Drive uses torque values defined by the start-up torque forward and reverse.
P2.15.12.2 Start-up torque, forward ID633
“StartupTorq FWD”
Sets the start-up torque for forward direction if selected with parameter Startup Torque.
P2.15.12.3 Start-up torque, reverse ID634
“StartupTorq REV”
Sets the start-up torque for reverse direction if selected with parameter Startup Torque.
P2.15.12.4 Start-Up Torque Time ID1371
“StartupTorq Time”
This parameter defines for how long the start-up torque will be used instead of the speed
controller output. If the time is set to -1 the drive will automatically start to use the speed
controller when speed change is read from encoder. When the setting is >0 the drive will
use this defined torque even if speed changes are read from encoder.