Frame FlexRay to Signal
- Updated2023-02-17
- 5 minute(s) read
Frame FlexRay to Signal
Converts between NI-XNET FlexRay frame data and signals.
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Inputs/Outputs

session in
The session to read. This session is returned from XNET Create Session. The session mode must be Conversion.

frame data
Provides the array of LabVIEW clusters.
Each array element corresponds to a frame value to convert.
The data you write is converted to signal values in the order you provide them. Only the latest signal value is returned.
The elements of each cluster are specific to the FlexRay protocol.

slot
A parameter that specifies the slot number within the FlexRay cycle.

cycle count
A parameter that specifies the cycle number.

startup?
A Boolean value that specifies whether the frame is a startup frame (true) or not (false). This field is ignored for conversion.

sync?
A Boolean value that specifies whether the frame is a sync frame (true) or not (false). This field is ignored for conversion.

preamble?
A Boolean value that specifies the value of the payload preamble indicator in the frame header.
If the frame is in the dynamic segment, preamble? being true indicates the presence of a message ID at the beginning of the payload. The message ID is always 2 bytes in length.
If preamble? is false, the payload does not contain a network management vector or a message ID.
This field is ignored for conversion.

chA
A Boolean value that specifies whether the frame was received on channel A (true) or not (false).

chB
A Boolean value that specifies whether to transmit the frame on channel B (true) or not (false).

echo?
An element not used for conversion. You must set this element to false.

type
The frame type.
The FlexRay Null type is not transmitted based on this type. As specified in the XNET Frame FlexRay:Timing Type property, the FlexRay null frame is transmitted when a cyclically timed frame does not have new data.

timestamp
An element that represents absolute time using the LabVIEW absolute timestamp type.

payload
The array of data bytes for FlexRay frames of type FlexRay Data.
You can leave all other FlexRay frame cluster elements uninitialized. For more information, refer to the section for each mode.
The XNET Convert (Frame FlexRay to Signal) node uses the following fields to identify a FlexRay frame:
- slot
- cycle count
- chA/chB

error in
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Default value: No error

session out
An output that is the same as session in, provided for use with subsequent nodes.

signal data
An output that returns a one-dimensional array of signal values. Each signal value is scaled, 64-bit floating point.
The data returns the most recent converted value for each signal. If multiple frames for a signal are input, only signal data from the most recent frame is returned. Here, most recent is defined by the order of the frames in the frame data array, not the timestamp.
If no frame is input for the corresponding signals, the XNET Signal Default Value is returned.

error out
Error information.
The node produces this output according to standard error behavior.