Can I show Auxiliary Lines on the Historical Trend Graph?

You can set three auxiliary lines: Upper Limit, Lower Limit, and Standard.
These lines allow you to easily determine whether an error has occurred or not.

1. To use Auxiliary Lines, the [Display Method] in the [Input/Display Settings] area must be set to [Show Scale].
To use this feature, your screen editor must be GP-Pro EX Ver. 2.20 or above.

Setup Instructions

1. Set [Sampling].
2. Place a Historical Trend Graph part and make the following settings to enable the Auxiliary Line feature.
(1) On the [Graph] tab, click [Extended].
(2) In the [Input/Display Settings] box, set the [Display Method]to [Show Scale]. Then, set the [Lower Limit] and the [Upper Limit] as needed.
(3) Open the [Auxiliary Line] tab and check the [Draw Line] box. Set each of the [Upper Limit], [Standard], and [Lower Limit] lines as needed.
  Example: Setting the [Upper Limit].
Specify Display Position
Constant Displays the Auxiliary Line at the position specified in the [Display Position].
Address Enables the user to vary the display position of the Auxiliary Line according to the value stored in the address specified in the [Displayed Position].
Display Position
Set the display postions of the Auxiliary Lines.
 Example: [Show Scale] is set to: Lower Limit = 0, Upper Limit = 500
  To display the graph shown below, [Specify Display Position] is set to [Constant] on the [Auxiliary Line] tab. [Upper Limit] is set to 400, [Standard] to 200, and [Lower Limit] to 100.

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