User`s manual

apfiff09 marine vacon • 147
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P2.6.5.5 Undervoltage controller ID608
Undervoltage controller will decrease the output frequency in order to get energy from
the motor when the DC voltage has dropped to a limit where the undervoltage controller
activates trying to keep DC voltage at the minimum level.
0 - Controller switched off
Both open and closed loop overvoltage controllers are off.
1 Activated PI-Controller type operation
Both open and closed loop controllers are activated.
Both open and closed loop controllers are PI-type controllers.
If power comes back while drive is at undervoltage the controller output frequency
will regain the reference value.
2 PI controller type and ramping down.
Both open and closed loop controllers are activated.
Both open and closed loop controllers are PI-type controllers.
If power comes back while drive is at undervoltage the controller drive will ramp to
zero speed and generate an undervoltage fault.
Note: In closed loop control,
activated to achieve identical operation.
P2.6.5.6 Under Voltage Reference Select ID1537
Select the operation level for open loop under voltage controller.
0
Under voltage operation level is selecte with P2.6.5.7
1
Automatic DC voltage level
P2.6.5.7 Under Voltage Reference OL ID1538
Set the operation level for open loop under voltage controller when P2.6.5.6 is 0 /
UnderVoltageRef.
7.6.5.1 CL Settigns
P2.6.5.8.1 Overvoltage reference ID1528
Defines the overvoltage reference level in Closed Loop control mode. Percentage value
related to unit nominal voltage DC voltage. Default 118 %.
690 Vac * 1,35 * 118 % = 1099 Vdc
500 Vac * 1,35 * 118 % = 796 Vdc
P2.6.5.8.2 Overvoltage controller motoring torque limit
Defines motoring torque limit, when drive is operating under over voltage controller.