Tutorial > Programming DC Output > Current Limit
Programming DC Output
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
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.