Rockwell Automation SA3000 High Power Modules - Manual (Page 37)

Diagnostics and Troubleshooting 4-5
4.3.1 Power Module Faults
The Power Module faults listed in table 4.3 will cause the SA3000 Power Module to
shut down. In a fault situation, the PMI Processor will command zero current and will
stop firing the Power Module’s IGBTs. Faults must be reset before the SA3000 Power
Module can be restarted.
4.3.1.1 DC Bus Overvoltage Fault
The DC Bus Overvoltage bit (bit 0) is set in the Fault register (202/1202) if the DC bus
voltage exceeds 925 VDC. Error code 1018 will also be displayed in the error log of
the UDC task in which the fault occurred.
4.3.1.2 DC Bus Overcurrent Fault
The DC Bus Overcurrent bit (bit 1) is set in the Fault register (202/1202) if the DC bus
current exceeds 125% of the rated SA3000 Power Module current. Error code 1020
will also be displayed in the error log of the UDC task in which the fault occurred.
4.3.1.3 Ground Current Fault
The Ground Current Fault bit (bit 2) is set in the Fault register (202/1202) if the ground
current exceeds the hardware trip point value of 100 Amps. Error code 2021 will also
be displayed in the error log of the UDC task in which the fault occurred.
Note that the Ground Current Fault bit (register 202/1202, bit 2) is not enabled on
SA3000 Power Modules using AC Technology modules, B/M 60023-5 and later. Error
code 2021 will not be displayed as the ground current hardware trip detector was
removed from the AC Technology modules, B/M 60023-5 and later.
Table 4.3 – SA3000 Power Module Faults (Register 202/1202)
Bit
Suggested
Variable
Name
UDC
Error
Code
Description Summary
0 FLT_OV@ 1018 The DC Bus Overvoltage bit is set if the DC bus voltage exceeds 925
VDC.
1 FLT_DCI@ 1020 The DC Bus Overcurrent bit is set if the DC bus current exceeds 125%
of the rated SA3000 Power Module current.
2 FLT_GND@ 1021 The Ground Current Fault bit is set if the ground current exceeds the
hardware trip point. See section 4.3.1.3.
3 FLT_IOC@ 1017 The Instantaneous Overcurrent Fault bit is set if an overcurrent is
detected in one of the power devices.
4 FLT_LPI@ 1022 The Local Power Interface bit is set if the power supply voltage on the
LPI module is not within tolerance.
6 FLT_CHG@ 1024 The Charge Bus Timeout Fault bit is set if the DC bus is not fully
charged within 10 seconds of being enabled, if the drive is on and
feedback indicates the pre-charge contactor has opened, or if DC bus
voltage is less than the Power Loss Fault Threshold tunable variable
(PLT_FLT%).
7 FLT_OT@ 1016 The Overtemperature Fault bit is set if the fault level thermal switch
(85
o
C (185
o
F)) in the SA3000 Power Module opens.