Get Information Operation

The Get Information operation retrieves low-level status and information from the power supply. You can determine whether an instrument is in constant current mode, or if an overcurrent, overvoltage, or unregulated condition exists in the instrument. You can also query the instrument for the maximum programmable voltage or current level the power supply accepts on a channel. You must specify an expression that contains a variable or property to which the step assigns the retrieved value.

The Get Information operation contains the following options:

• Channel Name —The name of the channel to operate on. The channel name must be a valid virtual channel name as the IVI configuration for the logical name being used defines.
• Query Max Current Limit —Queries the maximum programmable current limit the power supply accepts for a particular voltage level on a channel.
  • Voltage Level (Input) —The voltage level for which you want to find the maximum programmable current limit.
  • Max Current Limit (Output) —A variable or property to which the step assigns the maximum programmable current limit.
• Query Max Voltage Level —Queries the maximum programmable voltage level the power supply accepts for a particular current limit on a channel.
  • Voltage Level (Input) —The current limit for which you want to find the maximum programmable voltage level.
  • Max Voltage Level (Output) —A variable or property to which the step assigns the maximum voltage level.
• Query Output State —Queries the value of a specified DC power supply output state.
  • Output State —The output state to query.

    Supported Value	Description
    Constant Current (1)	Determines whether an instrument is in constant current mode. A constant current condition occurs when the output current is equal to the value of the Current Limit setting and the Current Limit Behavior setting is set to Current Regulate.
    Constant Voltage (0)	Determines whether an instrument is in constant voltage mode. A constant voltage condition occurs when the output voltage is equal to the value of the Voltage Level setting and the current is less than or equal to the value of the Current Limit setting.
    Over Current (3)	Determines whether an overcurrent condition exists in the instrument. An overcurrent condition occurs when the output current is equal to or greater than the value of the Current Limit setting and the Current Limit Behavior property is set to Current Trip.
    Over Voltage (2)	Determines whether an overvoltage condition exists in the instrument. An overvoltage condition occurs when the output voltage is equal to or greater than the value of the OVP Limit setting and the OVP Enabled setting is set to True .
    Unregulated (4)	Determines whether an unregulated condition exists in the instrument. An unregulated condition occurs when the output voltage is less than the value of the Voltage Level setting and the current is less than the value of the Current Limit setting.

  • Value —A Boolean variable or property to which the step assigns the output state.

    When either an overvoltage condition or an overcurrent condition occurs, the output protection of the power supply disables the output. When the power supply is in an overvoltage or overcurrent state, it does not produce power until the output protection is reset. The Reset Output Protection operation resets the output protection. Once the output protection is reset, the power supply resumes generating a power signal.

    Note Some drivers might not support the querying of all the output states. Reset Output Protection may not be supported with all drivers.