如何
自动配置 Y 轴标度
您可以将趋势图配置为自动配置 Y 轴标度。趋势图具有一左一右两个 Y 轴。您可以使用此步骤设置这两个轴的标度。
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.
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.
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.
在 WorkStation 的 系统树 窗格，选择想要配置的趋势图。
在 趋势图 工具栏，点击 打开趋势图设置 按钮
。action_zoom_plus_stroke 
在 趋势图表设置 对话框中，选择 自动配置左边 Y 轴标度 和 自动配置右边 Y 轴标度 。
点击 确定 。
现在 Y 轴标度会自动设置并通过显示的系列更新。
趋势图轴
手动配置 Y 轴标度
Assigning a Series to a Y-Axis
趋势图事件图标
Trend Chart Settings Dialog Box – Axes Tab
Trend Chart Does Not Show Trend Log Series