NI-DCPower: Add examples for electronic loads

CHANGELOG.md

@@ -66,6 +66,7 @@
         - `output_shorted`
       - Enum values:
         - `CONSTANT_RESISTANCE` and `CONSTANT_POWER` added to enum `OutputFunction`
+  - `nidcpower_constant_resistance_and_constant_power.py` and `nidcpower_sink_dc_current_into_electronic_load.py` examples
 - Changed
 - Removed
 

docs/nidcpower/examples.rst

@@ -12,6 +12,15 @@ nidcpower_advanced_sequence.py
    :encoding: utf8
    :caption: `(nidcpower_advanced_sequence.py) <https://github.com/ni/nimi-python/blob/master/src/nidcpower/examples/nidcpower_advanced_sequence.py>`_
 
+nidcpower_constant_resistance_and_constant_power.py
+---------------------------------------------------
+
+.. literalinclude:: ../../src/nidcpower/examples/nidcpower_constant_resistance_and_constant_power.py
+   :language: python
+   :linenos:
+   :encoding: utf8
+   :caption: `(nidcpower_constant_resistance_and_constant_power.py) <https://github.com/ni/nimi-python/blob/master/src/nidcpower/examples/nidcpower_constant_resistance_and_constant_power.py>`_
+
 nidcpower_lcr_source_ac_voltage.py
 ----------------------------------
 
@@ -30,6 +39,15 @@ nidcpower_measure_record.py
    :encoding: utf8
    :caption: `(nidcpower_measure_record.py) <https://github.com/ni/nimi-python/blob/master/src/nidcpower/examples/nidcpower_measure_record.py>`_
 
+nidcpower_sink_dc_current_into_electronic_load.py
+-------------------------------------------------
+
+.. literalinclude:: ../../src/nidcpower/examples/nidcpower_sink_dc_current_into_electronic_load.py
+   :language: python
+   :linenos:
+   :encoding: utf8
+   :caption: `(nidcpower_sink_dc_current_into_electronic_load.py) <https://github.com/ni/nimi-python/blob/master/src/nidcpower/examples/nidcpower_sink_dc_current_into_electronic_load.py>`_
+
 nidcpower_source_delay_measure.py
 ---------------------------------
 

src/nidcpower/examples/nidcpower_advanced_sequence.py

@@ -56,7 +56,7 @@ def _main(argsv):
     parser.add_argument('-v', '--voltage-max', default=1.0, type=float, help='Maximum voltage (V)')
     parser.add_argument('-i', '--current-max', default=0.001, type=float, help='Maximum Current (I)')
     parser.add_argument('-d', '--delay', default=0.05, type=float, help='Source delay (s)')
-    parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
+    parser.add_argument('-op', '--option-string', default='', type=str, help='Option String')
     args = parser.parse_args(argsv)
     example(args.resource_name, args.option_string, args.voltage_max, args.current_max, args.number_steps, args.delay)
 

src/nidcpower/examples/nidcpower_constant_resistance_and_constant_power.py

@@ -0,0 +1,116 @@
+#!/usr/bin/python
+
+import argparse
+import nidcpower
+import sys
+
+
+def example(
+    resource_name,
+    options,
+    output_function,
+    constant_resistance_level,
+    constant_resistance_level_range,
+    constant_resistance_current_limit,
+    constant_power_level,
+    constant_power_level_range,
+    constant_power_current_limit,
+    source_delay,
+):
+    assert output_function in (
+        nidcpower.OutputFunction.CONSTANT_RESISTANCE, nidcpower.OutputFunction.CONSTANT_POWER
+    ), 'This example only supports constant resistance and constant power output functions.'
+
+    with nidcpower.Session(resource_name=resource_name, options=options) as session:
+        # Configure the session.
+        session.source_mode = nidcpower.SourceMode.SINGLE_POINT
+        session.output_function = output_function
+        if output_function == nidcpower.OutputFunction.CONSTANT_RESISTANCE:
+            session.constant_resistance_level = constant_resistance_level
+            session.constant_resistance_level_range = constant_resistance_level_range
+            session.constant_resistance_current_limit = constant_resistance_current_limit
+        else:
+            session.constant_power_level = constant_power_level
+            session.constant_power_level_range = constant_power_level_range
+            session.constant_power_current_limit = constant_power_current_limit
+        # Configure the source delay to allow for sufficient startup delay for the input to reach
+        # the desired sinking level. When starting from a 0 A or Off state, the electronic load
+        # requires additional startup delay before the input begins to sink the desired level. The
+        # default source_delay in this example takes this startup delay into account. In cases where
+        # the electronic load is already sinking, less settling time may be needed.
+        session.source_delay = source_delay
+
+        with session.initiate():
+            session.wait_for_event(event_id=nidcpower.Event.SOURCE_COMPLETE)
+            measurement = session.measure_multiple()[0]
+            in_compliance = session.query_in_compliance()
+            print(f'Channel                   : {measurement.channel}')
+            print(f'Voltage Measurement       : {measurement.voltage:f} V')
+            print(f'Current Measurement       : {measurement.current:f} A')
+            print(f'Compliance / Limit Reached: {in_compliance}')
+            print(f'Resistance Measurement    : {measurement.voltage / measurement.current:f} Ω')
+            print(f'Power Measurement         : {measurement.voltage * measurement.current:f} W')
+
+        session.reset()
+
+
+def _main(argsv):
+    parser = argparse.ArgumentParser(
+        description=(
+            'Demonstrates how to use the Constant Resistance Output Function to force a resistance'
+            ' level on the electronic load and how to use the Constant Power Output Function to'
+            ' force a power level on the electronic load.'
+        ),
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+    parser.add_argument('-n', '--resource-name', default='PXI1Slot2/0', help='Resource names of NI electronic loads')
+    parser.add_argument('-o', '--output-function', default='CONSTANT_RESISTANCE', type=str, choices=('CONSTANT_RESISTANCE', 'CONSTANT_POWER'), help='Output function')
+    parser.add_argument('-rl', '--constant-resistance-level', default=15.0, type=float, help='Constant resistance level (Ω)')
+    parser.add_argument('-rr', '--constant-resistance-level-range', default=1.0e3, type=float, help='Constant resistance level range (Ω)')
+    parser.add_argument('-rc', '--constant-resistance-current-limit', default=800.0e-3, type=float, help='Constant resistance current limit (A)')
+    parser.add_argument('-pl', '--constant-power-level', default=7.0, type=float, help='Constant power level (W)')
+    parser.add_argument('-pr', '--constant-power-level-range', default=300.0, type=float, help='Constant power level range (W)')
+    parser.add_argument('-pc', '--constant-power-current-limit', default=800.0e-3, type=float, help='Constant power current limit (A)')
+    parser.add_argument('-s', '--source-delay', default=1.0, type=float, help='Source delay (s)')
+    parser.add_argument('-op', '--option-string', default='', type=str, help='Option String')
+    args = parser.parse_args(argsv)
+    example(
+        resource_name=args.resource_name,
+        options=args.option_string,
+        output_function=getattr(nidcpower.OutputFunction, args.output_function),
+        constant_resistance_level=args.constant_resistance_level,
+        constant_resistance_level_range=args.constant_resistance_level_range,
+        constant_resistance_current_limit=args.constant_resistance_current_limit,
+        constant_power_level=args.constant_power_level,
+        constant_power_level_range=args.constant_power_level_range,
+        constant_power_current_limit=args.constant_power_current_limit,
+        source_delay=args.source_delay,
+    )
+
+
+def main():
+    _main(sys.argv[1:])
+
+
+def test_example():
+    example(
+        resource_name='PXI1Slot2/0',
+        options={'simulate': True, 'driver_setup': {'Model': '4051', 'BoardType': 'PXIe', }, },
+        output_function=nidcpower.OutputFunction.CONSTANT_RESISTANCE,
+        constant_resistance_level=15.0,
+        constant_resistance_level_range=1.0e3,
+        constant_resistance_current_limit=800.0e-3,
+        constant_power_level=7.0,
+        constant_power_level_range=300.0,
+        constant_power_current_limit=800.0e-3,
+        source_delay=1.0,
+    )
+
+
+def test_main():
+    cmd_line = ['--option-string', 'Simulate=1, DriverSetup=Model:4051; BoardType:PXIe', ]
+    _main(cmd_line)
+
+
+if __name__ == '__main__':
+    main()

src/nidcpower/examples/nidcpower_lcr_source_ac_voltage.py

@@ -61,7 +61,7 @@ def _main(argsv):
     parser.add_argument('-ct', '--lcr-custom-measurement-time', default=10.0e-3, type=float, help='LCR custom measurement time (s)')
     parser.add_argument('-sm', '--lcr-source-delay-mode', default='AUTOMATIC', type=str, choices=tuple(nidcpower.LCRSourceDelayMode.__members__.keys()), help='LCR source delay mode')
     parser.add_argument('-s', '--source-delay', default=16.66e-3, type=float, help='Source delay (s)')
-    parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
+    parser.add_argument('-op', '--option-string', default='', type=str, help='Option String')
     args = parser.parse_args(argsv)
     example(
         resource_name=args.resource_name,

src/nidcpower/examples/nidcpower_measure_record.py

@@ -36,7 +36,7 @@ def _main(argsv):
     parser.add_argument('-n', '--resource-name', default='PXI1Slot2/0, PXI1Slot3/0-1', help='Resource names of NI SMUs.')
     parser.add_argument('-l', '--length', default='20', type=int, help='Measure record length per channel')
     parser.add_argument('-v', '--voltage', default=5.0, type=float, help='Voltage level (V)')
-    parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
+    parser.add_argument('-op', '--option-string', default='', type=str, help='Option String')
     args = parser.parse_args(argsv)
     example(args.resource_name, args.option_string, args.voltage, args.length)
 

src/nidcpower/examples/nidcpower_sink_dc_current_into_electronic_load.py

@@ -0,0 +1,138 @@
+#!/usr/bin/python
+
+import argparse
+import nidcpower
+import sys
+
+
+def example(
+    resource_name,
+    options,
+    current_level,
+    current_level_range,
+    voltage_limit_range,
+    source_delay,
+    output_shorted,
+    conduction_voltage_mode,
+    conduction_voltage_on_threshold,
+    conduction_voltage_off_threshold,
+    current_level_rising_slew_rate,
+    current_level_falling_slew_rate,
+):
+    with nidcpower.Session(resource_name=resource_name, options=options) as session:
+        # Configure the session.
+        session.source_mode = nidcpower.SourceMode.SINGLE_POINT
+
+        session.output_function = nidcpower.OutputFunction.DC_CURRENT
+        session.current_level = current_level
+        session.current_level_range = current_level_range
+        session.voltage_limit_range = voltage_limit_range
+        # Note that the Voltage Limit property is not applicable for electronic loads and is not
+        # configured in this example. If you change the Output Function, configure the appropriate
+        # level, limit and range properties corresponding to your selected Output Function.
+
+        session.source_delay = source_delay
+
+        # Configure the Output Shorted property to specify whether to simulate a short circuit in
+        # the electronic load.
+        session.output_shorted = output_shorted
+
+        # If you are using the DC Current or Constant Power Output Functions, set the Conduction
+        # Voltage Mode to "Automatic" or "Enabled" to enable Conduction Voltage.
+        # If you are using the DC Voltage or Constant Resistance Output Functions, set the
+        # Conduction Voltage Mode to "Automatic" or "Disabled" to disable Conduction Voltage.
+        # If Conduction Voltage is enabled, set the Conduction Voltage On Threshold to configure the
+        # electronic load to start sinking current when the input voltage exceeds the configured
+        # threshold, and set the Conduction Voltage Off Threshold to configure the electronic load
+        # to stop sinking current when the input voltage falls below the threshold.
+        # If Conduction Voltage is disabled, the electronic load attempts to sink the desired level
+        # regardless of the input voltage.
+        session.conduction_voltage_mode = conduction_voltage_mode
+        session.conduction_voltage_on_threshold = conduction_voltage_on_threshold
+        session.conduction_voltage_off_threshold = conduction_voltage_off_threshold
+
+        # If you are using the DC Current Output Function, configure the Current Level Rising Slew
+        # Rate and Current Level Falling Slew Rate, in amps per microsecond, to control the rising
+        # and falling current slew rates of the electronic load while sinking current.
+        # When using Output Functions besides DC Current, these properties have no effect.
+        session.current_level_rising_slew_rate = current_level_rising_slew_rate
+        session.current_level_falling_slew_rate = current_level_falling_slew_rate
+
+        with session.initiate():
+            session.wait_for_event(event_id=nidcpower.Event.SOURCE_COMPLETE)
+            measurement = session.measure_multiple()[0]
+            in_compliance = session.query_in_compliance()
+            print(f'Channel                   : {measurement.channel}')
+            print(f'Voltage Measurement       : {measurement.voltage:f} V')
+            print(f'Current Measurement       : {measurement.current:f} A')
+            print(f'Compliance / Limit Reached: {in_compliance}')
+
+        session.reset()
+
+
+def _main(argsv):
+    parser = argparse.ArgumentParser(
+        description=(
+            'Demonstrates how to use the DC Current Output Function to force a current into the'
+            ' electronic load and how to configure the electronic load with the Output Shorted,'
+            ' Conduction Voltage and Current Level Slew Rate features.'
+        ),
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+    parser.add_argument('-n', '--resource-name', default='PXI1Slot2/0', help='Resource names of NI electronic loads')
+    parser.add_argument('-cl', '--current-level', default=1.0, type=float, help='Current level (A)')
+    parser.add_argument('-cr', '--current-level-range', default=40.0, type=float, help='Current level range (A)')
+    parser.add_argument('-vr', '--voltage-limit-range', default=60.0, type=float, help='Voltage limit range (V)')
+    parser.add_argument('-s', '--source-delay', default=0.5, type=float, help='Source delay (s)')
+    parser.add_argument('-os', '--output-shorted', default=False, action='store_true', help='Output shorted')
+    parser.add_argument('-cv', '--conduction-voltage-mode', default='AUTOMATIC', type=str, choices=tuple(nidcpower.ConductionVoltageMode.__members__.keys()), help='Conduction voltage mode')
+    parser.add_argument('-nt', '--conduction-voltage-on-threshold', default=1.0, type=float, help='Conduction voltage on threshold (V)')
+    parser.add_argument('-ot', '--conduction-voltage-off-threshold', default=0.0, type=float, help='Conduction voltage off threshold (V)')
+    parser.add_argument('-rs', '--current-level-rising-slew-rate', default=24.0, type=float, help='Current level rising slew rate (A/µs)')
+    parser.add_argument('-fs', '--current-level-falling-slew-rate', default=24.0, type=float, help='Current level falling slew rate (A/µs)')
+    parser.add_argument('-op', '--option-string', default='', type=str, help='Option String')
+    args = parser.parse_args(argsv)
+    example(
+        resource_name=args.resource_name,
+        options=args.option_string,
+        current_level=args.current_level,
+        current_level_range=args.current_level_range,
+        voltage_limit_range=args.voltage_limit_range,
+        source_delay=args.source_delay,
+        output_shorted=args.output_shorted,
+        conduction_voltage_mode=getattr(nidcpower.ConductionVoltageMode, args.conduction_voltage_mode),
+        conduction_voltage_on_threshold=args.conduction_voltage_on_threshold,
+        conduction_voltage_off_threshold=args.conduction_voltage_off_threshold,
+        current_level_rising_slew_rate=args.current_level_rising_slew_rate,
+        current_level_falling_slew_rate=args.current_level_falling_slew_rate,
+    )
+
+
+def main():
+    _main(sys.argv[1:])
+
+
+def test_example():
+    example(
+        resource_name='PXI1Slot2/0',
+        options={'simulate': True, 'driver_setup': {'Model': '4051', 'BoardType': 'PXIe', }, },
+        current_level=1.0,
+        current_level_range=40.0,
+        voltage_limit_range=60.0,
+        source_delay=0.5,
+        output_shorted=False,
+        conduction_voltage_mode=nidcpower.ConductionVoltageMode.AUTOMATIC,
+        conduction_voltage_on_threshold=1.0,
+        conduction_voltage_off_threshold=0.0,
+        current_level_rising_slew_rate=24.0,
+        current_level_falling_slew_rate=24.0,
+    )
+
+
+def test_main():
+    cmd_line = ['--option-string', 'Simulate=1, DriverSetup=Model:4051; BoardType:PXIe', ]
+    _main(cmd_line)
+
+
+if __name__ == '__main__':
+    main()

src/nidcpower/examples/nidcpower_source_delay_measure.py

@@ -47,7 +47,7 @@ def _main(argsv):
     parser.add_argument('-v1', '--voltage1', default=1.0, type=float, help='Voltage level 1 (V)')
     parser.add_argument('-v2', '--voltage2', default=2.0, type=float, help='Voltage level 2 (V)')
     parser.add_argument('-d', '--delay', default=0.05, type=float, help='Source delay (s)')
-    parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
+    parser.add_argument('-op', '--option-string', default='', type=str, help='Option String')
     args = parser.parse_args(argsv)
     example(args.resource_name, args.option_string, args.voltage1, args.voltage2, args.delay)