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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