Rockwell Automation SB3000 AC Power Modules - Manual (Page 47)

Diagnostics and Troubleshooting 4-9
4.3.2.3 Ground Current Warning
The Ground Current Warning bit (bit 2) is set in the Warning register (203/1203) if the
ground current exceeds the ground fault current level stored in local tunable GIT_EI%.
4.3.2.4 Phase Lost Warning
The Phase Lost Warning bit (bit 3) is set in the Warning register (203/1203) if a phase
loss occurs in the AC line.
4.3.2.5 Reference in Limit Warning
The Reference in Limit Warning bit (bit 4) is set in the Warning register (203/1203) if
the UDC reference value (register 102/1102) is less than the minimum value or
greater than the maximum value allowed. In the Bridge Test mode, this bit is used to
indicate an illegal test code.
4.3.2.6 Load Sharing Warning
The Load Sharing Warning bit (bit 6) is set in the Warning register (203/1203) if a
current sharing problem develops between parallel SB3000 Power Modules. Bits 13,
14, or 15 in registers 204/1204, 220/1220, or 221/1221 will be set to indicate the
phase and SB3000 Power Modules affected.
4.3.2.7 Overtemperature Warning
The Overtemperature Warning bit (bit 7) is set in the Warning register (203/1203) if
the warning level thermal switch (78
o
C (172.4
o
F)) in the SB3000 Power Module
opens. Bit 12 in register 204/1204, 220/1220, or 221/1221 will be set to indicate which
SB3000 Power Module is affected.
4.3.2.8 Bad Gain Data Warning
The Bad Gain Data Warning bit (bit 8) is set in the Warning register (203/1203) if a
tunable variable is changed to an illegal value when the UDC task is running. The
value will be restored to its previous valid value by the PMI Processor.
4.3.2.9 Power Module Overload Warning
The Power Module Overload Warning bit (bit 9) is set in the Warning register
(203/1203) if the continuous current rating of the SB3000 Power Module is exceeded
for approximately five minutes and does not decrease and maintain the continuous
current rating for at least 45 minutes.
4.3.2.10 Power Loss Warning
The Power Loss Warning bit (bit 10) is set in the Warning register (203/1203) if the
power dip ride-through feature of the SB3000 Power Module has been enabled. This
will occur if the PMI Processor detects that the AC input voltage is less than 75% or
more than 125% of the configured value. When this bit is set, the PMI Processor
disables the firing of the IGBTs. If power is restored within 10 seconds, the PMI
Processor will resynchronize and resume operation. If power is not restored within 10
seconds, bit 10 in register 202/1202 will be set and the SB3000 Power Module will
shut down.