In order to turn off the DL3021 electronic load (as in: disable any constant current/resistance/voltage/power function) via LXI, run the following command:
:SOURCE:INPUT:STATE Off
PyVISA example
For more info, see PyVISA Rigol DL3021 via LXI (TCP SCPI) example
#!/usr/bin/env python3 rm = pyvisa.ResourceManager() inst = rm.open_resource("TCPIP0::192.168.178.112::INSTR") # Query if instrument is present # Prints e.g. "RIGOL TECHNOLOGIES,DL3021,DL3A204800938,00.01.05.00.01" print(inst.query("*IDN?")) # Turn electronic load off inst.write(":SOURCE:INPUT:STATE Off")