83-517-000 Rev.
A
68
Conditional Registers
7.8.2
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 a description of the Fault Condition Register bits
and Table 7-8 for the Status Condition Register bits.
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
operating range.
2
Over-
Temperature
OTP
OTP
shutdown has occurred.
OTP
condition removed and power
supply returns to normal operation.
3
FOLD
back
FOLD
FOLD
back shutdown has
occurred
The power supply output is turned
ON
by front panel
OUT
button or
OUT 1
command.
4
Over-Voltage
OVP
OVP
shutdown has
occurred.
The power supply output is turned
ON
by front panel
OUT
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 power supply output is turned
ON
by front panel
OUT
button or
OUT 1
command.
7(MSB)
Enable
ENA
Rear panel J1 Enable
terminals (J1-1 & J1-14)
opened.
Rear panel J1 Enable terminals
closed.
Table 7-7: Fault Condition Register
BIT
Status name
Status symbol
Bit Set condition
Bit Reset condition
0 (LSB)
Constant-
Voltage
CV
Output is
ON
and the power
supply is in
CV
mode.
Output is
ON
and the power supply is
NOT
in
CV
mode.
1
Constant-
Current
CC
Output is
ON
and the power
supply is in
CC
mode.
Output is
ON
and the power supply is
NOT
in
CC
mode.
2
No Fault
NFLT
The power supply is
operating normally or fault
reporting is not Enabled.
See the
“
OUT n
” command
in Section 7.8.5.
One or more faults are active and fault
reporting is E
nabled (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
AST 1
serial command).
Supply is in
Safe-Start
mode (from
Front Panel or
AST 0
serial
command).
5
Fold
Enabled
FDE
FOLDback protection is
Enabled (from front panel
FOLD
button or
FLD 1
serial
command).
FOLD
back protection is Disabled (from
front panel
FOLD
button or
FLD 0
serial command).
6
Spare bit
SPARE
Fixed to zero.
Fixed to zero.
7(MSB)
Local Mode
LCL
Power supply in
Local
mode.
Power supply in
Remote
mode or
Local-Lockout
mode.
Table 7-8: Status Condition Register
