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8303460000 Rev A IA672-04-01-Rev. I
11.4.3. Set Auto-Restart or Safe-Start Modes
This command sets the way the power supply will power-up when the AC is switched
on. It also affects how the supply recovers when latching faults are cleared
Latching faults include: AC fault, over-temperature, J1-Enable and J1-Shut Off. The
auto-restart mode changes the response of the power supply when, for example, the
AC power recovers from a momentary drop-out or the J1-Enable signal is restored to
normal
The start mode may be viewed on the supply front panel by pressing and holding the
OUT button (while in local mode). When the AC is first switched on, the power supply
output may be forced off, even with the auto-start enabled, by pressing and holding
the OUT button during the power-up sequence
This command is in addition to SCPI requirements
Syntax: OUTPut:PON <0|1|OFF|ON>
Parameter:
Supply will power-up with the output off but it
keeps all other last power-down settings.
If all faults clear, output will stay off but
it keeps all other settings made before the
fault occurred
Supply will power-up with the output on at the
last power-down settings.
If all faults clear, output will automatically
turn back on to the last settings before
the fault occurred
Example: OUTP:PON 1 (or OUTP:PON ON)
Query: OUTP:PON? will return ON in the example
11.5. Output Protection
11.5.1. Set Over-Voltage Protection
This command sets the over-voltage protection level. If the power supply output
exceeds this voltage at its output (or at a remote sense point), then the output will
immediately turn off, the supply front panel will show “OUP” and the Questionable
Condition register bit 4 will be set high.
The voltage limit setting, made by the front panel encoder or the :VOLT command (in
section 11.2.1), is restricted to 95% of the OVP setting. Likewise, the OVP setting
cannot be made lower than 105% of the voltage limit setting. The over-voltage
protection may not be disabled.
The OVP setting may be viewed on the supply front panel by pressing and releasing
the OVP/UVL button. This fault is cleared by turning the output on again.
Syntax: [SOURce:]VOLTage:PROTection:LEVel <nn.nn|MAX>
Parameter: nn.nn will set the OVP to a value in volts
MAX will set the OVP to the maximum value,
typically 10% above the power supply’s voltage rating
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