Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual User Manual
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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