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概念
产品：
WebStation
功能：
趋势
产品版本：
1.8, 1.9, 2.0, 2.1, 3.0, 3.1, 3.2, 3.3, 2022, 2023, 2024
2024/3/14
WebStation 中的趋势图轴
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.
图：
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.
图：
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.
图：
Grid lines, schematic
趋势图
趋势图运作方式
趋势日志运作方式
Trends Overview
趋势图视图
趋势图工具栏
趋势图设置对话框 – X 轴选项卡
通过相对时间跨度配置 X 轴
通过绝对时间跨度配置 X 轴
显示趋势图网格线
手动配置 Y 轴标度
自动配置 Y 轴标度