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Operating Instructions
58
DLY 0.500
Note that during the delay period CV and CC are masked from the foldback protection feature also. Delay does not affect
the setting of the CV, CC, or OR bits in the status register or accumulated status register; delay affects only the setting of
those bits in the fault register. Delay does not affect conditions other than CV, CC, or OR that may cause service request,
nor will delay affect CV, CC, or OR if they occur at any time other than after a programmed output change.
Output On/Off. The power supply output can be turned on and off using these commands-
OUT OFF or OUT 0:
OUT ON or OUT 1
OUT OFF does not affect the voltage and current settings. OUT ON enables the power supply and returns the output to the
present voltage and current settings, which can be changed while the output is off. OUT ON will not reset OVP, foldback
protection, remote inhibit (INH), or fault indicator (FLT).
Output on/off is particularly useful when storing values for later recall. (Note that output on/off is the only programmable
state that is not stored.) With the output off, the user can set up and store as many as 16 versions of the complete machine
state without having the output change to a particular set of values until that setup is required.
The state of the output on/off function may be read by sending:
OUT ?
and addressing the power supply to talk. The response from the power supply is in this format:
OUT 0 or OUT 1
in which 0 indicates that the power supply output is off, and I indicates it is on.
Foldback Protection. As described on page 39, foldback protection can be enabled to turn off the power supply output if the
power supply switches from the protected operating mode (either CV or CC) to the other mode. If the power supply changes
to the specified mode, the output will be turned off and the DISABLED and FOLDBACK indicators will turn on. To
prevent nuisance tripping while the output is being reprogrammed, foldback protection is inhibited during the delay period.
Foldback protection is programmed using these codes:
FOLD OFF or FOLD 0
FOLD CV or FOLD 1
FOLD CC or FOLD 2
FOLD CV means that the power supply should be operating in CC Mode, and foldback protection will turn off the output if
the power supply switches to CV mode. FOLD CC means that foldback occurs if the power supply switches to CC mode.
The state of the foldback protection function may be read by sending:
FOLD?
and addressing the power supply to talk. The response from the power supply is in this format:
FOLD 0 or FOLD 1 or FOLD 2
in which 0 indicates that foldback protection is off, 1 indicates foldback protection will trip if the power supply switches to
CV mode, and 2 indicates that foldback protection will trip if the power supply switches to CC mode.