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概念

概念


产品: AS-C, AS-B, Enterprise Server, AS-P, Project Configuration Server, Project Configuration Tool
功能: 趋势
产品版本: 1.8
2016/10/13

Implicit Trend Logs

​The implicit log is a change of value trend log which monitors the IO variable and records a new value if the variable exceeds the delta. Each log value is stored as a record in the trend log. The delta is automatically defined by Building Operation depending on the measured unit of the device that is connected to the IO port.

注释:
  • The implicit log is not manually created as with the other trend logs in WorkStation.

The implicit trend log exists on all IO points. When a device is connected to an IO port, the implicit trend log is automatically configured and starts recording values.

表格: The Implicit Trend Log Delta for Different Units

Unit

Delta

Temp

0.2 ºC (0.2 ºF)

Voltage

0.2 V

Current

0.3 mA

Resistance

200 Ω

The implicit trend log stores approximately 500 records before old records are overwritten.

  • Trend Log Types
  • Trends Overview
  • Trend Units
  • Viewing Related Trends
  • Change of Value Trend Logs