MaxValue property

During run time, the value of the MaxValue property can be modified to change the maximum measured value shown by a trend. During run time, MaxValue can be a read/write or a read only property based on the value assigned to the Trend Pen’s Y Axis Range option during design time.

• When Y Axis Range is set to Auto-Range during design time

  The maximum measured value shown by a trend is set to the maximum value of data received from the Historian or from current data during the trend period. MaxValue is read only.

• When Y Axis Range is set to Clip out of range values during design time

  The maximum measured value shown by a trend is set to a maximum limit set from the Max Range option during design time.

  MaxValue is read/write and can be changed during run time. When MaxValue is changed during run time, the trend line is redrawn based on the values assigned to the MinValue and MaxValue properties.

  When the values assigned to MinValue and MaxValue properties are the same, the trend’s Y Axis Range automatically changes to Auto-Range.