Operation
Accumulated Status, Status, and Fault Registers
46
Operating Manual for GPIB for XPD Series Power Supply
Accumulated Status, Status, and Fault Registers
The GPIB option card uses three separate registers which are always active. They
are the accumulated status, status, and fault registers. You can use the status
commands shown in Table 3.8, “Status Commands” to activate the registers. The
bit register has twelve conditions, each assigned a bit weight. When querying a
register, the controller returns a response which is the sum of the weights of all
relevant conditions.
Example
:
Table 3.10
Accumulated Status, Status, and Fault Registers
Notes:
1.
All mnemonics can be masked or unmasked.
2.
The error (ERR) bit is reset in the accumulated status, status, and serial poll registers with an
error query (ERR?).
3.
The accumulated status register is cleared with an accumulated status query (ASTS?).
4.
A fault is cleared with a fault query (FAULT?).
ASTS?
Query the Accumulated Status register.
ASTS <771>
Controller response.
771 = 512 + 256 + 2 + 1 = PON + REM + CC + CV
Condition
Mnemonic Bit Position Bit Weight
Constant voltage operation
CV
0
1
Constant current operation
CC
1
2
Not used
–
2
4
Overvoltage protection tripped
OV
3
8
Over temperature protection tripped
OT
4
16
Supply external shutdown active (J21-1)
SD
5
32
Foldback mode operation
FOLD
6
64
Remote programming error
ERR
7
128
Power ON (accumulated status, status
registers only)
PON
8
256
Remote mode (accumulated status, status
registers only)
REM
9
512
AC fail condition
ACF
10
1024
Output fail condition
OPF
11
2048
Sense protection tripped
SNSP
12
4096
