# 6.3.9 History XY Plot

**Introduction**

The data in cache will display as continuous curve or separated points, each point in XY plot needs 2 addresses to set a point.

**Description**

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LuqB9LT_gvwMaqXcWhj%2F-LuqEAD2_B-np03IVEA7%2F55.png?generation=1575015464054774\&alt=media)

**1) Source**

**Curve buffer:** Select data from \[[History XY Plot](https://wecon.gitbook.io/pistudio-manual/8.-basic-functions/8.7-history-xy-plot)] settings and display data in term of curve;

**Curve displays:** HMI will display curves according to select \[Data record], and user could select which curves need to be displayed and select \[Line type] and \[Color] for each curve;

**2) Range**

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LuqB9LT_gvwMaqXcWhj%2F-LuqEAD3-Ro97dyM1V2y%2F56.png?generation=1575015464051445\&alt=media)

**Variable:** The data range for the graph could be set as a variable;

**X, Y Limit:** Set the max and min value of displaying curve;

**Result**

When all configurations are completed, when the HMI is running, it displays as shown below.

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LuqB9LT_gvwMaqXcWhj%2F-LuqEAD4rjrF4R7ykIjy%2F57.png?generation=1575015464085485\&alt=media)