Tutorial > Programming DC Output > Current Limit

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Programming DC Output

Current Limit

DC Voltage | Current Limit

The PCR-M has a programmable current limit function for its RMS limit value and type of current limit operation.

 

:CURRent:OFFSet 4.0

:CURRent:PROTection:STATe 0

 

If the load attempts to draw more averaged DC current than the programmed limit or draw more PEAK current than the system-defined PEAK limit, the output voltage is reduced to keep the current within the limits.

The response of the current detection feature is not instantaneous. Whenever a PEAK current that exceeds the given limit value is detected, the PCR-M raises an OVERLOAD warning, and then sets the CL-pk bit (bit 10) on the STATus:QUEStionable register.

There are two behaviours for current limiting - Limit Control and Trip. When Limit Control is selected (CURRent:PROTection:STATe is 0), the voltage output retains the reduced state without tripping the output. When Trip is selected (CURRent:PROTection:STAT is 1), the output is tripped when the voltage reduction continues for a given period.