Rockwell Automation SA3000 High Power Modules User Manual
Page 39
Diagnostics and Troubleshooting
4-7
4.3.2 Power Module Warnings
The following warnings indicate conditions which are not serious enough to shut down
the SA3000 Power Module but may affect its performance. See table 4.4. Warnings
cause no action by themselves. Any response to a warning condition is the
responsibility of the application task.
4.3.2.1 DC Bus Overvoltage Warning
The DC Bus Overvoltage bit (bit 0) is set in the Warning register (203/1203) if the DC
bus voltage exceeds the overvoltage threshold value stored in local tunable
OVT_E0%.
4.3.2.2 DC Bus Undervoltage Warning
The DC Bus Undervoltage bit (bit 1) is set in the Warning register (203/1203) if the DC
bus voltage drops below the under voltage threshold value stored in local tunable
UVT_E0%.
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 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 SA3000 Power Modules. Bits 13,
14, or 15 in registers 204/1204, 220/1220, or 221/1221 will be set to indicate the
Power Module and phase that caused the warning.
Table 4.4 – SA3000 Warning Register 203 /1203
Bit
Suggested
Variable
Name
Description Summary
0
WRN_OV@
The DC Bus Overvoltage fault bit is set if the DC bus voltage exceeds the
overvoltage threshold value stored in local tunable OVT_E0%.
1
WRN_UV@
The DC Bus Undervoltage bit is set if the DC bus voltage drops below the under
voltage threshold value stored in local tunable UVT_E0%.
2
WRN_GND@
The Ground Current Warning bit is set if the ground current exceeds the ground
fault current level stored in local tunable GIT_EI%.
6
WRN_SHR@
The Load Sharing Warning bit is set if a current sharing problem develops
between parallel SA3000 Power Modules.
7
WRN_OT@
The Overtemperature Warning bit is set if the warning level thermal switch (78° C
(172.4
o
F)) in the SA3000 Power Module opens.