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The watchdog delay can be programmed from 1 to 3600 seconds in 1-second increments. To enable
the watchdog timer and specify a delay value, proceed as follows:
Front Panel Menu Reference
Select Protect\WDog
Check Enable Watchdog to enable the watchdog timer.
Enter a value in the Watchdog Delay box. Then press Select.
Set the Under-Voltage Protection
The under-voltage protection will disable the output if the output voltage falls below the programmed
low voltage setting. The voltage circuit monitors the voltage at the + and – sense terminals.
This protection function is different from the
mode, which only prevents the output voltage from dropping below the low voltage limit when
discharging a battery.
When enabled, the under-voltage protection is always "armed". Therefore, the output voltage must be
greater than the protection setting to prevent it from tripping. There are two ways to prevent this
protection from tripping during the voltage transition when the output is turned on:
Disable the under-voltage protection and turn the output on. When the output voltage is at the tar-
l
get value, turn under-voltage protection on. Of course, if the voltage value (or voltage limit in cur-
rent priority mode) is less than the protection setting, the under-voltage protection will still trip.
Enable the under-voltage protection, but set a delay that is longer than the output up-pro-
l
gramming time to prevent the protection from tripping during the voltage up-programming time.
The under-voltage protection will be held-off during the delay period to allow the output voltage to
transition to the target value.
The under-voltage protection delay can be programmed from 20.48 microseconds to 2611 seconds in
20.48 microsecond increments. To enable the under-voltage protection and specify a delay value,
proceed as follows:
Front Panel Menu Reference
Select Protect\UVP
Enter a value in the UVP level box.
Then check Enable UVP
Enter a value in the UVP Delay box.
Then press Select.
Keysight RP7970 & RP7980 Series Operating and Service Guide
4 Using the Regenerative Power System
SCPI Command
To enable the watchdog timer:
OUTP:PROT:WDOG ON
To set the watchdog timer to 120 seconds:
OUTP:PROT:WDOG:DEL 120
low voltage
setting that is programmed in current priority
SCPI Command
To set the UVP level to 2 volts:
VOLT:PROT:LOW 2
To enable low-voltage protection:
VOLT:PROT:LOW:STAT ON
To specify a protection delay of 5 seconds:
VOLT:PROT:LOW:DEL 5
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