Xantrex Technology GPIB-XPD manual Accumulated Status, Status, and Fault Registers

Operation

Accumulated Status, Status, and Fault Registers

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:

ASTS?	Query the Accumulated Status register.
ASTS <771>	Controller response.
771 = 512 + 256 + 2 + 1 = PON + REM + CC + CV
Table 3.10 Accumulated Status, Status, and Fault Registers
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		PON	8	256
registers only)
Remote mode (accumulated status, status		REM	9	512
registers only)
AC fail condition		ACF	10	1024
Output fail condition		OPF	11	2048
Sense protection tripped		SNSP	12	4096

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?).

46 Operating Manual for GPIB for XPD Series Power Supply