Rockwell Automation SD3000 Drive Configuration, Programming - Manual (Page 49)

202/1 202 Drive Fault Register (Continued)
Bit: 15
Hex Value: 8 0 0 0 H
Sug. Var. Name:
FLT_COM@
Range: N/A
Access: Read Only
UDC Error Code: 1015
LED:
N/A
Description: The Communication Lost Fault bit is set when the fiber-optic communication between
the PMI Processor and the UDC module is lost due to two consecutive communication errors of any
type. This bit is set only after communication between the PMI Processor and the UDC module has
been established. Refer to section 4.2.3 for additional information. Also refer to the CCLK
Synchronized bit (register 200/1 200, bit 14).
203/1 203 Drive Warning Register
The warnings indicated by this register cause no action by themselves. Any resulting action is
determined by the application task. The user must ensure that the AutoMax application task monitors
register 203/1 203 and takes appropriate action if any of these conditions occur. When a warning
condition is detected, these bits are latched until the Warning Reset bit (bit 9) of the Drive Control
register (register 100/1 100) is set to 1 and then cleared.
Bit: 0
Hex Value:
0001 H
Sug. Var. Name: WRN_SCR@
Range: N/A
Access: Read Only
UDC Error Code: N/A
LED: N/A
Description: All SCRs are not carrying the same the load. A bit is set in the SCR Diagnostic register
(register 204/1204) to indicate which SCR is not working properly. Refer to the SCR tunable section
(6.2.2.3) for more information.
Bit: 1
Hex Value: 0002H
Sug. Var. Name:
WRN_LAC@
Range: N/A
Access: Read Only
UDC Error Code: N/A
LED: N/A
Description: The Low Line Voltage/Phase Missing bit is set when the system detects that the A-C
line voltage is less than 85% of its nominal value, which was entered as a configuration parameter.
This can be caused by a low-line condition or a missing phase. The system will automatically adjust
the phase angle to give the correct current amount and will continue to fire SCRs as long as zero
crossings are detected. If zero crossings are no longer detected, a fault condition will result.
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