Rockwell-automation 20D PowerFlex 700S with Phase I Control Reference Manual de usuario Pagina 150

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150 Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
Chapter 1 Detail Drive Configuration and Operation
Settings for parameter 222 [Mtr Fdbk Sel Pri] and parameter
223 [Mtr Fdbk Sel Alt]:
Parameter 224 [TachSwitch Level] sets the detection level for the automatic
speed loss switch over routine. A drop in feedback speed at the percent of rated
speed over a 0.5 ms interval will cause a tach switch from primary to alternate
device. Setting this level lower will make the speed detection more sensitive and
lower the minimum speed at which a speed switch could occur. Setting this level
higher will make the speed switch less sensitive and raise the minimum speed for
speed switch detection.
Parameter 320 [Exception Event1] bits 2 through 5 show the error status of the
corresponding speed feedback device.
Parameter 365 [Fdbk LsCnfg Pri] and parameter 366 [Fdbk LsCnfg Alt] set the
feedback loss configuration for each feedback device. The primary feedback
device should be configured to 1 “Alarm. The alternate feedback device should
typically be configured to 2 “FltCoastStop.
Settings for [Fdbk LsCnfg Pri] and [Fdbk LsCnfg Alt]:
Parameter 510 [FVC Mode Config] bit 22 “SrLss RdThru” must be set to “1” if
sensorless operation is selected in [Mtr Fdbk Sel Alt]. In all other cases Parameter
510 bit 22 should be set to “0”.
Speed Feedback Loss Ride Through Operation
Setting up the feedback loss ride through function requires the following steps:
1. Enter a valid feedback device selection in parameter 222 [Mtr Fdbk Sel
Pri].
2. Enter a valid feedback device selection in parameter 223 [Mtr Fdbk Sel
Alt].
3. Setting parameter 365 [Fdbk LsCnfg Pri] to 1 “Alarm.
4. Setting parameter 366 [Fdbk LsCnfg Alt] to 2 “FltCoastStop
(recommended but not necessary).
0 = Encoder 0 3 = Reserved
1 = Encoder 1 4 = Motor Sim
2 = Sensorless 5 = FB Opt Port0
2 = Encdr0 Loss
3 = Encdr1 Loss
4 = FB Opt0 Loss
5 = FB Opt1 Loss
1 = Alarm
2 = FltCoastStop
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