In VehicleScape DAQ the Standalone Logging of a Histogram collection will log the frequency of data points across a value range over a period of time.

Table 1 describes the settings in Figure 1 and some other settings that affect all collections.

Table 1: Standalone Logging Histogram Settings

Histogram Setting	Description
Collection / Log File Name	The name of this collection and the root name of all log files it creates.
Dimensions	In this collection, log a histogram that uses from 1 to 3 axes.
X Y Z Axis Setting	Description
Expression	In this collection, for this axis, count the frequency of values created by this expression. The Expression Builder DAQ data source will list signals selected on the VehicleScape DAQ Channels tab.
Value is calculated based on "Time" while expression is non-zero (in seconds)	In this collection, for this axis, count the length of time (in seconds) that the axis expression is non-zero.  Use this to count how often an event of varying duration has occurred.
Min/Max Value	In this collection, for this axis, set limits on the value range to keep track of.
Number of Buckets	In this collection, for this axis, set the number of buckets to apply across the value range.
Add to closest bucket	In this collection, for this axis, if the axis expression falls outside the value range then count that value in the closest bucket.
Create dedicated spillover buckets	In this collection, for this axis, add spillover buckets at each end of the value range for counting values that fall outside the value range.
Increment an "invalid" counter	In this collection, for this axis, increment an "invalid" counter each time the axis expression falls outside the value range.
Histogram Sample Options	Description
Every	In this collection, start logging at a chosen periodic rate in seconds.
Only when expression is true	In this collection, start logging data at a chosen periodic rate while the expression is true.
Using Trigger	In this collection, start logging data after an expression trigger event.
Trigger when expression is true	In this collection, start logging data after the expression is true for a selected time.
Trigger when expression changes	In this collection, start logging data after the expression changes from its current value.
Trigger when expression increases/decreases	In this collection, start logging data after the expression changes from its current value by some chosen amount.
Manual Trigger	In this collection, start logging data if the neoVI MOTE or other pendant button is pressed.
Always DAQ	In this collection, always request DAQ items even if they are not being logged.  Requested DAQ items are diagnostic signals that get polled from ECUs like DTCs, PIDs, ISO 14229 IDs, and MEP A2L file data items.  This must be enabled if a start expression uses any requested DAQ item.
The following settings affect ALL Standalone Logging collections
Reporting Options	Options for physical logger feedback and Live Data reporting to a Wireless NeoVI website.
Power Management	Logger sleep and wakeup selections are made here.
Generate	Generates the final script and opens a dialog to send it to ICS hardware that supports standalone logging.

Figure 1: The Standalone Logging Histogram settings.

neoVI PLASMA Documentation - (C) Copyright 2019 Intrepid Control Systems, Inc.

Last Update: Friday, May 3, 2013