The Soft-GRAF HMI object - "g_Trend" is to draw time-varying curves of one to three data tags in a trend chart. The trend chart can be divided into two types, one is the real-time trend chart. It draws the present curve. Designers can decide how long to draw it once (Sample rate). The highest sample rate is to draw once per second and the lowest is to draw once per 15 minutes. The other one is historical trend chart. Users can press the "History" button in the "g_Trend" HMI object to show the historical trend chart and then query the historical trend data from, for instance, a few days ago to several minutes before.

The “Sample Time” setting relates to the retaining time of historical data in the PAC.
The retaining time is 3 months if “Sample Time” setting is 1 second.
The retaining time is 6 months if “Sample Time” setting is 2 seconds.
The retaining time is 9 months if “Sample Time” setting is 3 seconds.
The retaining time is 12 months if “Sample Time” is 4 seconds or more than 4 seconds.

Bar Meter
Bar meter (g_Bar) uses a bar chart to represent a value. Designers can setup it as unipolar or bipolar of "g_Bar". The direction of "g_Bar" can be set as horizontal (to the left or to the right), or vertically up or down. It can also show or hide the scale. In addition, you can set it to show another color or blink it if the value is over the limitation to attract the on-site operator’s attention.


Angular Meter
Angular meter (g_Gauge) uses an upper semi-circular to represent a value and its maximum angle from left to right is 170-degree. It has three colors (green, yellow, red). Designers can choose to show three-section, two-section or one-section color. The meter can be divided into max. 10 scales and it may show only 5 scales if the angle setting is too small. The meter’s pointer will move according to the value and you can change its color to the proper color.