180
• VACON®
apfiff09 marine
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
P2.6.5.5
Undervoltage controller
ID608
”Undervolt Contr”
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
“Off”
- Controller switched off
Both open and closed loop overvoltage controllers are off.
1
“On:NoRamping” –
Activated PI-Controller type operation
Both open and closed loop controllers are activated.
If power comes back while drive is at under voltage the controller output frequency
will regain the reference value.
2
“On: Ramping” –
PI controller type and ramping down.
Both open and closed loop controllers are activated.
If power comes back after under voltage controller has been active, drive will ramp to
zero speed using ramp time 2 and generate an under voltage fault (F9) with sub code
S3.
Note
: In closed loop control, also the
parameter “CLrmpFollEncFreq” needs to be
activated to achieve identical operation.
P2.6.5.6
Under Voltage Reference Select
ID1537
”UnderVoltRef.Sel”
Select the operation level for open loop under voltage controller.
0
“UnderVoltRef”
Under voltage operation level is selected with P2.6.5.7
1
“
0.
8 * Estimated DC Voltage”
Automatic DC voltage level
P2.6.5.7
Under Voltage Reference OL ID1538
”UnderVoltage Ref”
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
“OverVoltageRef.”
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.
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