84
83503001 Rev G
7.11.2. Conditional Registers
The fault Condition Register and the Status Condition Register are read-only registers
that the user may read to see the condition of the Power supply. Refer to Table 7-7 for
description of the Fault Condition Register bits and Table 7-8 for the Status Condition
register bits.
Table 7-7: Fault Condition Register (FLT?)
BIT Fault name
Fault
symbol
Bit Set condition Bit Reset condition
0 (LSB) Spare bit SPARE Fixed to zero Fixed to zero
1 AC Fail AC AC fail has occurred. The AC input returns to normal.
2
Over
temperature
OTP
OTP shutdown has
occurred.
The power supply cools down.
3 Foldback FOLD
Foldback shutdown has
occurred
The supply output is turned On by front
panel button or OUT 1 command.
4 Over voltage OVP
OVP shutdown has
occurred.
The supply output is turned ON by front
panel button or OUT 1 command.
5 Shut Off SO
Rear panel J1 “Shut Off”
condition has occurred.
Rear panel J1 “Shut Off” condition has
been removed.
6 Output Off OFF
Front panel OUT button
pressed to Off.
The supply output is turned On by front
panel button or OUT 1 command.
7(MSB) Enable ENA
Rear panel J1 Enable
terminal (J1-1&J1-14)
opened.
Rear panel J1 Enable terminals closed.
Table 7-8: Status Condition Register (STAT?)
BIT Fault name
Fault
symbol
Bit Set condition Bit Reset condition
0 (LSB)
Constant
Voltage
CV
Output is On and the supply
in CV.
Output is ON and the supply is not in
CV.
1
Constant
Current
CC
Output is ON and the supply
in CC.
Output is ON and the supply is not in
CC.
2 No Fault NFLT
The power supply is
operating normally or fault
reporting is not enabled.
See “OUT n” command in
Section 7.7.5.
One or more faults are active and fault
reporting is enabled (using “FENAxx”).
3 Fault active FLT
One or more faults are
enabled and occur.
Fault Event Register cleared (FEVE?).
4
Auto-Restart
Enabled
AST
Supply is in Auto-Restart
mode (from Front Panel or
serial command).
Supply is in Safe-Start mode (from
Front Panel or serial command).
5
Fold
Enabled
FDE
Fold protection is
enabled (from Front Panel or
serial command).
Fold protection disabled (from Front
Panel or serial command).
6 Spare bit SPARE Fixed to zero. Fixed to zero.
7(MSB) Local Mode LCL Supply in Local mode.
Supply in Remote mode or Local-
Lockout mode.
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