DMM - Read Measurement Step

Use the DMM – Read Measurement step to read, publish and return the digital multimeter measurement results for the specified DMM pins on all sites in the Pin Map context.

This step publishes measurement data for the specified pins to the ECU Multi Test step type instances with their module adapter configured as Sequence for all sites in the Pin Map context.
Note The DMM - Read Measurement step must be used inside of an ECU Multi Test or ECU Action step with its module adapter configured as Sequence. The DMM - Read Measurement step requires the Pin Map context passed from these steps as an input.

Use the DMM – Read Measurement step edit tab in the TestStand Sequence Editor to specify the Pin Map context and the pins to query to obtain their associated NI-DMM instrument sessions.

DMM - Read Measurement Step Settings Tab

The DMM - Read Measurement Step Settings tab contains the following options:
  • Pin Map Context—Specifies a reference to a Pin Map Context object. This object describes a subset of pins, sites, and instruments from the pin map file and provides data pertinent to each site executing during a test.
  • Pins—Specifies the pins to query to obtain their associated NI-DMM instrument sessions. These instrument sessions are used to read measurement results from the specified pins. The specified pins must be defined in the pin map file and included in the Pin Map context Pins and Relays list in the Options tab of the ECU Multi Test step.
    Note The DMM - Read Measurement step filters the pins specified by instrument type ID. If none of the pins specified have an instrument type ID of niDMM, the step will do nothing, as none of the specified pins are connected to NI-DMM instruments.
  • Published Data ID—The unique ID for a measurement. This can be used to distinguish measurements when you publish multiple measurements for a single pin within the same low-level sequence. The default published data ID is Measurement.
  • Measurements (Optional)—An expression that specifies a location to store the measurement data for one or more pins on all sites in the Pin Map context. The measurement results are organized as a two-dimensional array of Number values. Each array row corresponds to a pin, with the first row representing the first valid pin in the list of pins defined by Pins. Each array column corresponds to a site, with column indexes corresponding with the site order in the Pin Map Context. Use a two-dimensional array of Number values to store the measurement results for use in subsequent steps.