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class DataloggerApi.Frame

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A frame may be incomplete when retrieved from a running model.

Attributes (private):

• timestamps (tuple of float): the timestamps (in nanoseconds) of the recorded data.

• signals_data (tuple of tuple of float): list of values per recorded signal present in the frame.

• signal_count (int): number of signals returned.

• step_count (int): number of steps filled (corresponds to the number of values returned for each signal).

• time_step_ns (int): step duration in nanoseconds.

• is_complete True when this is the last (or only) part of the frame, False otherwise.

get_signal_count()

Returns signal count.

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Related methods: SignalGroup.get_frame_config() SignalGroup.configure_frame()

Args:

• signal_names (tuple of str): list of signals for which the values must be retrieved.

• start_time_ns (int): start time of the frame in nanoseconds (file interface only).

• frame_size_ns (int): frame size in nanoseconds. 0 (default): the frame is auto-sized.

• step_count (int): number of steps per frame.

get_frame_size()

Returns the frame size (nanoseconds).

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Set frame size (nanoseconds).

Args:

• frame_size_ns (int): the required frame size in nanoseconds.

set_signals(signal_names)

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Defines the list of signals that must be recorded.

Args:

• signal_names (tuple of str): tuple containing the names of the signals to record.

set_start_time(start_time_ns)

Set the frame start time (in nanoseconds).

Args:

• start_time_ns (int): start time of the frame (file interface only).

set_step_count(step_count)

Set the number of steps in the frame.

Args:

• step_count (int): number of steps in the frame.

set_step_count_from_duration(duration_ns, time_step_ns)

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Utility method to simplify call to set_step_count().

Args:

• duration_ns (int): duration of the frame in nanoseconds.

• time_step_ns (int): time step of the frame in nanoseconds.

DataloggerApi.RecordingStatus

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SignalGroup can be connected to a dedicated signal group or to a .oprec file.

Args:

• arg1 (str): IP address (live streaming) or file name (file streaming).

• arg2 (str or int): connection port or signal group name (live streaming) or default value (file streaming).

clear_trigger()

Removes a previously defined trigger.

close()

Close the connection to the DataLoggerTool.

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This function MUST be called before any call to get_frame().

Args:

• frame_config (FrameConfig): frame configuration parameters.

configure_trigger(trigger_config)

Updates trigger configuration.

Args:

• trigger_config (TriggerConfig): trigger configuration with the following attributes set appropriately: trigger_level, trigger_type, trigger_holdoff.

get_file_name()

Retrieves the recording file name.

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Returns: (Frame) filled with the values of the configured signals.

Raises:

• DataloggerApi.dlogutillib_no_data_available: No data are available, try later to get next frame data (live streaming only).

get_timestamp_range()

Retrieves information about the timestamps (min and max).

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Converts current instance to other file type and save it to the file system.

Args:

• dest_type (FileType): the type to convert to.

• dest_file_path (str): full path to the destination file. If not specified, the current file path is used with the file extension replaced.

Returns: (str): generated output file path.

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set_trigger(trigger_config)

Set new trigger.

Args:

• trigger_config (TriggerConfig): trigger configuration with the following attributes set appropriately: signal_name, trigger_type, trigger_level, offset_sec.

start_recording(file_name=”)

Starts the recording of the .oprec file.

Args:

• file_name (str): the file name used to store signals’ values. When not specified, the preconfigured file name is used along with integer id. This id is incremented for each started record.

stop_recording()

Stops the recording of the .oprec file.

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This class is instantiated by the get_signal_groups_info() function.

Args:

• id (str): unique recorder identifier.

• recorderName (str): Recorder name as seen in UI.

• name (str): signal group name.

• filename (str): file name defined for the signal group.

• port (int): TCP/IP port used to communicate with the signal group.

get_filename()

Returns the file name associated with the signal group.

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class DataloggerApi.SignalInfo(source=”, type=”, destination=”, id=”, direction=”, label=”, alias=”)

Detailled Detailed information on a signal.

This class is instantiated by SignalGroup.get_signals_info().

Args:

• source (str): Connection point name in the model. This is the name used to configure the frame (see FrameConfig.set_signals()).

• type (str): Type of connection point (the source).

• destination (str): Connection point name in the Datalogger.

• id (str): Unique identifier of the connection between model and Datalogger.

• direction (str): Direction of

  datalogged

  recorded data.

• label (str): Signal’s label.

• alias (str): Alias set by user on the signal.

get_alias()

Returns signal alias.

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This class is instantiated by SignalGroup.get_step_info()

Args:

• time_step_ns (int): time step in nanoseconds.

get_time_step()

Returns time step in nanoseconds.

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Range of timestamps.

Args:

• min_timestamp_ns (int): minimum timestamp of the range in nanoseconds.

• max_timestamp_ns (int): maximum timestamp of the range in nanoseconds.

get_max_time()

Returns max timestamp (in nanoseconds).

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Related methods: SignalGroup.set_trigger() SignalGroup.get_trigger_config() SignalGroup.configure_trigger()

Args:

• signal_name (str): Trigger signal name (file trigger only).

• type (TriggerConfig.type): Trigger type.

• level (float): Reference value activating the trigger.

• holdoff_steps (int): Percentage of the record length allocated to the values before the trigger

• event occurs (live trigger only).

• offset_sec (float): Offset in seconds (file trigger only).

get_holdoff()

Returns trigger holdoff.

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get_type()

Returns trigger type.

set_holdoff(trigger_holdoff)

Set trigger holdoff (in computation steps).

Args:

• trigger_holdoff (int): number of steps before re-arming the trigger.

set_level(trigger_level)

Set trigger level.

Args:

• trigger_level (float): reference value used for the trigger.

set_offset(offset_sec)

Set offset (in seconds).

Useful when working on OPREC files.

Args:

• offset_sec (float): defines starting point from which to take the trigger into account.

set_signal(signal_name)

Set signal name.

Args:

• signal_name (str): name of the signal used for the trigger.

set_type(trigger_type)

Set trigger type.

Args:

• trigger_type (TriggerConfig.type): defines the type of trigger (

  egde

  edge rising/falling or level high/low).

type

• alias of Enum

DataloggerApi.enum(**enums)

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Retrieves information about signal groups.

Args:

• ip (str): IP address to query for available data loggers.

Returns: (tuple of SignalGroup) tuple of SignalGroup objects.