1 dc bus overvoltage fault (bit 0), 2 dc bus overcurrent fault (bit 1), 3 ground current fault (bit 2) – Rockwell Automation SA3100 AC Power Modules User Manual
Page 49: 4 instantaneous overcurrent fault (bit 3), 5 isolated 12v supply fault (bit 4), 6 charge bus time-out fault (bit 6), Dc bus overvoltage fault (bit 0) -3, Dc bus overcurrent fault (bit 1) -3, Ground current fault (bit 2) -3, Instantaneous overcurrent fault (bit 3) -3
Diagnostics and Troubleshooting
4-3
4.3.1 DC Bus Overvoltage Fault (Bit 0)
LED indicator: EXT FLT
The DC Bus Overvoltage fault bit is set if the DC bus voltage exceeds the rating of the
Power Module. Error code 1018 will be displayed in the error log of the UDC task in
which the fault occurred.
4.3.2 DC Bus Overcurrent Fault (Bit 1)
LED indicator: P.M. FLT
The DC Bus Overcurrent fault bit is set if the DC bus current exceeds 125% of the
rated Power Module current. Error code 1020 will be displayed in the error log of the
UDC task in which the fault occurred.
4.3.3 Ground Current Fault (Bit 2)
LED indicator: EXT FLT
The Ground Current Fault bit is set if ground current exceeds the rating of the Power
Module. Error code 1021 will be displayed in the error log of the UDC task in which
the fault occurred.
4.3.4 Instantaneous Overcurrent Fault (Bit 3)
LED indicator: P.M. FLT
The Instantaneous Overcurrent Fault bit is set if an overcurrent is detected in one of
the power devices. Register 204/1204, bits 0-5, indicate which power device detected
the overcurrent. Error code 1017 will be displayed in the error log of the UDC task in
which the fault occurred.
4.3.5 Isolated 12V Supply Fault (Bit 4)
LED indicator: P.M. FLT
The Isolated 12V Supply Fault bit is set if the voltage level of the 12V Pulse/Tach
power supply or the external LEM power supply falls below 8V. Error code 1022 will
be displayed in the error log of the UDC task in which the fault occurred.
4.3.6 Charge Bus Time-Out Fault (Bit 6)
LED indicator: EXT FLT and P.M. FLT
The Charge Bus Time-Out Fault bit is set if any of the following conditions occurs:
•
The DC bus is not fully charged within 10 seconds after the bus enable bit (register
100/1100, bit 4) is set
•
The drive is on and feedback indicates that the pre-charge contactor has opened
•
DC bus voltage is less than the value stored in the Power Loss Fault Threshold
(PLT_E0%) tunable variable.
•
The lack of 115VAC or 24V DC applied to the precharge module on common bus
units (C through H-frame)