description: >-
  This interface defines an isolation monitoring device (IMD) according
  to IEC 61557-8 for DC charging. This is used to verify isolation of the DC lines
  before starting high voltage charging and during charging.
cmds:
  start:
    description: >-
      Start recurring isolation measurements. The device should monitor
      the isolation status until stopped and publish the resistance data in regular
      intervals. The actual interval is device dependent.
  stop:
    description: >-
      Stop recurring measurements. The device should stop to monitor the
      isolation resistance and stop publishing the data.
  start_self_test:
    description: >-
      Start self test. This will be done during the CableCheck phase, so a DC voltage will be present
      according to IEC 61851-23 (2023). The command should return immediately.
      The "self_test_result" variable must be published once the self testing is done.
      Note that on many hardware devices this can take a long time (e.g. 20 seconds).
    arguments:
      test_voltage_V:
        description: >-
          Specifies the test voltage [V] that is applied on the DC pins during self test.
          This can be used to verify the internal voltage measurement of the IMD.
        type: number
vars:
  isolation_measurement:
    description: Isolation monitoring measurement results
    type: object
    $ref: /isolation_monitor#/IsolationMeasurement
  self_test_result:
    description: Indicates the self test is done and publishes the result. Set "true" for success, "false" for failure.
    type: boolean
errors:
  - reference: /errors/isolation_monitor