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Operation
3–10 TM-XR9B-01XN
DLY <seconds> Sets 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 commands. During the time delay, the power supply disables CV, CC, and
FOLD conditions from generating faults, preventing possible nuisance foldback if
the supply momentarily switches modes while changing an output setting.
Range: 0 to 32 seconds, with 32ms resolution
Initial value: 0.5 second
DLY? Asks for the setting of the programmable time delay before the supply reports fault
conditions.
Response: DLY <seconds>
ERR? Asks for the most recent remote programming error. When the power supply
detects 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
detected, the remaining portion of the command line is discarded. An error query
clears 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
<2/CC>, <1/CV>,
<0/OFF>
Sets foldback mode for the supply. Foldback protection disables the power supply
output when the output enters the fold condition. Reset with the RST command.
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
Table 3-7
Command Reference
TM-XR9B-01XN.book Page 10 Monday, April 19, 2004 9:00 AM