Keba ServoOne - Page 30

typically raised all the way over the braking chopper threshold, resulting in the
braking energy being converted into braking resistance. Accordingly, the drive will
decelerate as quickly as possible.
Mode 4
Only with expanded VFC functionality.
Mode 5
Same as mode 1, but with absolute voltage levels and without a validation check.
P2942[0] - POWF_VOn is used to define the power failure detection limit. P2942[1]
- POWF_VRef is used to define the voltage setpoint. The configured values will not
be checked to see if they are valid. The user themselves will be responsible for
ensuring that the values entered make sense.
Mode 6
Same as mode 2, but with absolute voltage levels and without a validation check.
P2942[0] - POWF_VOn is used to define the power failure detection limit. P2942[1]
- POWF_VRef is used to define the voltage setpoint. The configured values will not
be checked to see if they are valid. The user themselves will be responsible for
ensuring that the values entered make sense.
Mode 7
Same as mode 6, but with pulse operation.
P2942[0] - POWF_VOn is used to define the power failure detection limit. P2942[1]
- POWF_VRef is used to define the voltage setpoint. The configured values will not
be checked to see if they are valid. The user themselves will be responsible for
ensuring that the values entered make sense.
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
30
4 Power stage
4.2.1.4Parameters
P No. Index Name / Setting Unit Function
2940 0 CON_PowerFail  Powerfailurebridging:selector
  Off(0)  Functiondisabled
  RET(1)  Functionenabled.Returnofpowerallowedifit
occurswithindefinedtime;otherwise,trigger
erroruponreturn
  NORET(2)  Functionenabled.Returnofpowernotallowed-
>Triggererroruponreturn.
  NOLIM(3)  Functionenabled.Returnofpowercannotbe
detected.
  VFC_NOLIM(4)  Speedreduction(VFC)asfastaspossible(HF
software)
  RETABS(5)  Sameas"RET(1)",bitwithabsolutevoltages
andwithoutvalidationchecks.
  NORETABS(6)  Sameas“NORET(2)",bitwithabsolute
voltagesandwithoutvalidationchecks.
  NORETABSPULSE(7)  Sameas"NORETABS(6)",butwithpulse
operation.
2941  CON_POWF_VCtrl  Powerfailurebridging
 0 Kr A/V Powerfailurebridging:Gain
 1 Tn ms Powerfailurebridging:Resettime
 2 imax A Powerfailurebridging:Maximum(negative)q
current
 3 imax_pos A Powerfailurebridging:Maximumqcurrent
 4 n_min rpm Powerfailurebridging:Minimumspeedfor
voltagecontroller
2942  CON_POWF_VLim  Voltagelimitforpowerfailure
 0 POWF_Von V Powerfailuredetectionlimit
 1 POWF_VRef V Voltagereferencevalue
2943 0 CON_POWF_RetTime ms Settingoftimewindowinwhichmainspower
canberestored
701  MON_ActValues  
 12 u_zkoff VDC UZKundervoltagethreshold
 17 u_bc_on VDC Brakingchopperthreshold
Table 4.7: “Power failure bridging” parameters