Description

Operation

Table 3-7Command Reference


Command	Description
DLY <seconds>	S ts a programmable time delay employed by the supply before reporting fault
	conditions. The power supply uses the time delay after receiving a new output
	voltage or current setting via VSET or ISET, or after receiving RST, TRG, or OUT
	ON	omma ds. During the time delay, the power supply disables CV, CC, and
	FOLD conditions from generating faults, preventing possible nuisance foldback if
	the sup ly momentarily switches modes while changing an output setting.
	Range: 0 to 32 seconds, with 32ms resolution
	Initial value: 0.5 second
DLY?	Asks for he setting of the programmable time delay before the supply reports fault
	conditions.
	R	ponse: DLY <seconds>

ERR?	Asks for he most recent remote programming error. When the power supply
	d te ts a programming error, it lights the ERR LED and sets the ERR bit in the
	accumulated status and fault registers. If the error bit has been masked using the
	MASK command, then the ERR bit in the registers will not set. Once an error is
	d te ted, the remaining portion of the command line is discarded. An error query
	cl ars the ERR bit in the accumulated status register. See “Error Codes” on page 3–
	19.
	Response: ERR <error number> Example: ERR 0 (if no error)

FAULT?	Asks for the state of the fault register. A bit is set in the fault register when a fault
	arises for that condition. Lists the conditions which activate a fault bit. You can use
	the MASK command to disable bits from being set in the fault register.
	When a bit is set in the fault register it also asserts a signal on the Pin 4 user signal
	line. You can tie the Pin 4 fault line signal to the power supply's own External
	Shutdown user line, Pin 1, so that the shutdown signal goes low (active) in the case
	of a user-defined fault.
	The FAULT? query clears bits in the supply's fault register and fault line.
	Response: FAULT <fault mask> where fault mask is the decimal equivalent of the
	total bit weights for the operating conditions as listed in the fault register. See
	“Accumulated Status, Status, and Fault Registers” on page 3–17.

FOLD	Sets foldback mode for the supply. Foldback protection disables the power supply
<2/CC>, <1/CV>,	output when the output enters the fold condition. Reset with the RST command.
<0/OFF>	Example: Specify FOLD 1 or FOLD CV (Constant Voltage) when you want the
	supply to operate in Constant Current mode and have foldback protection disable
	the output if the supply switches to Constant Voltage mode.
	Initial value: FOLD 0/OFF

3–10	TM-XR9B-01XN

DLY?

ERR?

FAULT?