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Can I show auxiliary lines on the Historical Trend Graph?

You can set three auxiliary lines: Upper Limit, Lower Limit, and Standard.
You can 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.

How to set up

1. Set [Sampling].
2. Place a Historical Trend Graph part and make settings.
  Setup of [Auxiliary Line]
(1) On the [Graph] tab, click [Extended].
(2) Set the [Display Method] in the [Input/Display Settings] are to [Show Scale] and set the [Lower Limit] and the [Upper Limit].
(3) Open the [Auxiliary Line] and check the [Draw Line] box. Set each of the [Upper Limit], [Standard], and [Lower Limit]
  e.g.) Setting the [Upper Limit]
Specify Display Position
Constant Displays the Auxiliary Line at the position specified in the [Display Position].
Address Enables to vary the display position of the Axiliary Line according to the value stored in the address specified in the [Displayed Position].
Display Position
Set the display postions of the Auxiliary Lines.
 e.g.) Lower Limit = 0, Upper Limit = 500 when specifying [Show Scale]
  If you set [Specify Display Position] to [Constant] on the [Auxiliary Line] tab and set the [Upper Limit] to 400, [Standard] to 200, and [Lower Limit] to 100, the graph will be shown as below.


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