7.7.18. Parameter identifier scaling (ppid_Scaling)
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7.7.18. Parameter identifier scaling (ppid_Scaling)

This block outputs a raw byte value to represent the input with the scaling applied.

7.7.18.1. Supported targets

All targets

7.7.18.2. Required license

EXT_DIAG (Extended diagnostics library). (See Section 2.3, “Licensed Features”.)

7.7.18.3. Description

A PID value is usually stored in the ECU (server) in a finite number of bytes with an associated scaling. This scaling is common to both the client (diagnostic scan tool) and server.

The scaling block has been added as an aid to encoding a PID value with a scaling. As such it is envisaged that the output of this block will feed into the input of ppid_Pid. The scaling applied by this block follows the form of raw = (in - Scaling offset )/ Scaling/bit

Note this block does not support multi-packed PIDs such as PID $01 of SAE J1979.

7.7.18.4. Inports

  • in

    Input value to be scaled.

    Value type:Integer

7.7.18.5. Outports

  • raw

    Raw bytes output to represent the input with the scaling applied.

    Value type:Integer

7.7.18.6. Mask parameters

  • J1979 standard scaling

    If ticked a drop down list of standard J1979 scalings is revealed. The scalings in the list are as per Annex B of issue 7 of ISO15031-5 (SAE J1979).

    Value type:List
    Calibratable:No

  • Scaling/bit

    Numeric field to enter the scaling/bit.

    For example a value of 0.25 in this field would result in 4 being output (assuming the offset is set to 0) from this block when the input is 1.

    Value type:Real
    Calibratable:Yes, offline

  • Scaling offset

    Numeric field to enter the scaling offset.

    For example with a value of 0.25 set in the scaling/bit field and this field set to 0.5, would result in 2 being output from this block when the input is 1.

    Value type:Real
    Calibratable:Yes, offline

  • Max

    Numeric field to enter the maximum value of the input. An input value exceeding the maximum value is clipped to the maximum value prior to the scaling being applied.

    Value type:Real
    Calibratable:Yes, offline

  • Min

    Numeric field to enter the minimum value of the input. An input value falling below the minimum value is clipped to the minimum value prior to the scaling being applied.

    Value type:Real
    Calibratable:Yes, offline

  • Engineering Units

    String field to the engineering units associated with the scaling. The string in this field should be enclosed with single apostrophes.

    Value type:String
    Calibratable:No

  • Data type out

    A drop down list of the supported data types out. The supported data types are:

    • uint8
    • uint16
    • uint32

    Value type:List
    Calibratable:No

7.7.18.7. Notes

None.

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7.7.17. Parameter identifier (ppid_Pid) Home 7.7.19. Freeze frame (pff_FreezeFrame)