Cursors
Clicking inside the graphical area it’s possible to display curves value around that point.Some system variables have been created with the following criteria:@@LOG_VALUE@@LOG_TIMEWith:: “index” property value: graph curve number (from 1 to 8)Example (with index = 0):@@LOG0_VALUE1@@LOG0_VALUE2@@LOG0_TIME1The “cursor” property allows to optionally activate a graphical cursor visualization, where the user clicks.Please note: in case of multiple curves displayed at the same time, it’s possible that, clicking on a graphical position, not all the curves have a sampled value at that point. For example, when the curves has a different sample time, or some curves sampling haven’t been started before that point. In these cases, with cursor in “FULL” mode, more cursors will be automatically shown, one for every curve, at the click nearest position found (the search finds the first value with time >= click position). The cursors will have the curve number displayed beside them.For example:
Using the system variable described, for position (TIME) and value (VALUE) it’s possible to have a look at coherent data, for every cursor displayed.In the described case, the cursors have been located on different positions for some curves, with the following couples TIME/VALUE:
Cursors colorThe cursors will be drawn using the same color as the associated curve. In case of SINGLE cursor, the curve 1 color will be used.If two, or more, cursors overlap, the result color will be obtained mixing all the associated colors (XOR operation). In this case the number beside the cursor (and its color) will help to identify the associated curve.Fine tuning cursor positioningUse the “cursorMove” Action (see below) to move cursors by a desired offset.Values precisionThe curve value inside variables “VALUE” is taken from the graphical curve (and not directly from the Datalog memory buffer), so little roundups or limitations are present:Inside REAL data, the value (absolute without sign) cannot overtake the value 2147483,647Inside REAL data, decimal digits over the third will be removed.BOOL variables are displayed with the numerical values 0/1If a click takes place on an empty area (without data), the value will be “N/A” and position “NOT FOUND”
Using the system variable described, for position (TIME) and value (VALUE) it’s possible to have a look at coherent data, for every cursor displayed.In the described case, the cursors have been located on different positions for some curves, with the following couples TIME/VALUE:
Cursors colorThe cursors will be drawn using the same color as the associated curve. In case of SINGLE cursor, the curve 1 color will be used.If two, or more, cursors overlap, the result color will be obtained mixing all the associated colors (XOR operation). In this case the number beside the cursor (and its color) will help to identify the associated curve.Fine tuning cursor positioningUse the “cursorMove” Action (see below) to move cursors by a desired offset.Values precisionThe curve value inside variables “VALUE” is taken from the graphical curve (and not directly from the Datalog memory buffer), so little roundups or limitations are present:Inside REAL data, the value (absolute without sign) cannot overtake the value 2147483,647Inside REAL data, decimal digits over the third will be removed.BOOL variables are displayed with the numerical values 0/1If a click takes place on an empty area (without data), the value will be “N/A” and position “NOT FOUND”