Chapter 4
Description of Operation
4-7
Power-Up/Down Sequence
Figure 4.3 describes the various steps involved in the power-up/down
sequence of the 1391-DES Drive.
Figure 4.3
Drive Power-Up / Down Sequence
Apply AC Input Power to Isolation Transformer
a) Logic power supplies and base drive circuits
power-up.
b) Apply 115V AC to contactor.
c) Power bus charges.
d) If no faults are encountered, the DROK relay
energizes. Drive is ready to receive customer
enable signal.
Enable Signal is Applied Prior to 36V AC Power
a) When 36V AC power is applied, fault circuits detect
that the enable signal is already applied. Random
fault conditions occur.
b) Re-application of enable after resetting the drive
and with 36V AC power still present, will energize
the drive.
Enable Signal Removed
a) Motor will regenerate to a stop.
b) Output power stage is disabled.
c) DROK relay maintains a no fault status.
Fault Condition Occurs
a) Drive output stage disabled.
b) DROK relay is de-energized and a fault is
displayed.
c) If contactor (M) is wired to the DROK relay in a
stop string, contactor will open and the shunt
regulator will discharge the power bus supply.
POWER-UP SEQUENCE
AC Input Power Removed
a) Logic and DC link power supplies begin decaying to
zero volts.
b) Undervoltage (fault) condition occurs.
c) DROK relay de-energizes based on setting of
parameter 130.
POWER-DOWN SEQUENCE
Enable Signal Applied
Minimum of 100 ms after Contactor is Closed
a) Base drive enabled and will respond to velocity
command inputs.
Fault
Fault
Fault
Fault
Fault
Summary of Contents for ALLEN-BRADLEY 1391-DES
Page 1: ...User Manual 1391 DES Digital AC Servo Drive...
Page 9: ...Chapter 1 Introduction 1 10 End of Chapter...
Page 37: ...Chapter 5 Inputs Outputs and Switch Settings 5 8 End of Chapter...
Page 84: ...Chapter 8 Start Up 8 16 End of Chapter...
Page 88: ...Chapter 9 1326 AC Servomotors 9 4 End of Chapter...
Page 106: ...Chapter 11 Troubleshooting 11 12 End of Chapter...
Page 122: ...Appendix B Interconnect Drawings B 12 End of Appendix...
Page 126: ...Appendix C Cable Information C 4 End of Appendix...
Page 134: ...Appendix E Parameter Record E 8 End of Appendix...
Page 135: ...Notes...
Page 136: ...Notes...
Page 137: ...Notes...
Page 138: ...Notes...
Page 139: ...Notes...
Page 140: ...Notes...
Page 141: ...Notes...
Page 142: ...Notes...
Page 143: ...Notes...
Page 144: ...Notes...
Page 147: ...IMC is a trademark of Allen Bradley Company Inc...
