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Concept

Concept


Products: WebStation
Functionalities: Trends
Product version: 1.8, 1.9, 2.0, 2.1, 3.0, 3.1, 3.2, 3.3, 2022, 2023, 2024
7/13/2021

Trend Chart Axes in WebStation

The x-axis of the trend chart represents time. The time span of the axis can be set with a fixed start and end time or with an end time relative to the present time. The axis can be quick-scaled to show the last hour, last day, last month, or last year​.

 
action_zoom_plus_stroke Absolute time span and relative time span, schematic

Absolute time span and relative time span, schematic

The y-axis refers to the measurement unit that the variable represents. The scale of the y-axis can be set manually or by auto scale. You can configure the trend chart to present series on one y-axis or two y-axes, one to the left and one to the right. Use two y-axes to present series with different ranges in the same trend chart.

 
action_zoom_plus_stroke One y-axis and two y-axes, schematic

One y-axis and two y-axes, schematic

To make reading easier, grid lines can be shown in the trend chart. Grid lines can be shown in both the x- and y-direction, independent of each other.

 
action_zoom_plus_stroke Grid lines, schematic

Grid lines, schematic

  • Trend Charts
  • How Trend Charts Work
  • How Trend Logs Work
  • Trends Overview
  • Trend Chart View
  • Trend Chart Toolbar
  • Trend Chart Settings Dialog Box – X Axis Tab
  • Configuring the X-axis with a Relative Time Span
  • Configuring the X-axis with an Absolute Time Span
  • Showing Trend Chart Grid Lines
  • Manually Configuring the Y-Axis Scale
  • Automatically Configuring the Y-axis Scale