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如何

如何


产品: AS-B, Edge Server, Enterprise Central, Enterprise Server, AS-P, WorkStation, Project Configuration Tool
功能: 趋势
产品版本: 2023
2024/5/21

配置间隔趋势日志

您可以配置间隔趋势日志的属性,以满足站点的特有需求。

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​The interval trend log collects data at a specific time interval. Each logged value is stored as a record in the trend log. Use this trend log when the logging interval is less than 1 hour.

您可以使用 WorkStation 或 WebStation 创建间隔趋势日志。在 WorkStation 中,您可以配置间隔趋势日志的属性,以满足站点的特有需求。 

例如,在下图中,间隔趋势日志会每分钟记录一个变量。记录会通过趋势图进行打印。间隔趋势日志不会记录间隔之间的值。

 
action_zoom_plus_stroke 间隔趋势日志示意图。
图: 间隔趋势日志示意图。

间隔趋势日志的间隔与趋势的激活时间一致。例如,如果激活时间是 9 时 01 分 00 秒,间隔为 15 分钟,趋势将记录 9 时 16 分 00 秒、9 时 31 分 00 秒、9 时 46 分 00 秒等等。

间隔时区

默认设置下,间隔日志使用 UTC 来确定何时采用下个日志样本。在夏令时时间更改之后,当间隔长于 1 个小时并且您希望继续记录该间隔时,使用服务器本地时间。例如,日志间隔是每隔 24 小时的午夜,并且即使在夏令时时间更改之后,您希望继续在午夜记录,从而可使用服务器本地时间。在春季的夏令时时间更改期间,日志样本将在 23 小时之后注册。在秋季的夏令时时间更改之后,日志样本将在 25 小时之后注册。

间隔趋势日志增量

An interval trend log with delta can reduce the storage of similar records, and may not fill up the storage capacity as quickly as an interval trend log with no delta.

An interval trend log with delta checks the monitored value at each interval and records the new value if it differs from the previously recorded value by more than the delta. Delta is the difference between the current variable value and the last log value. To log a variable according to the time interval, use a delta of zero.

例如,在下图中,间隔趋势日志会每分钟记录一个变量,但前提是变量超过或低于增量 3。记录会通过趋势图进行打印。请注意,具有增量的间隔趋势日志不会记录间隔之间的值,或变量位于增量之内的间隔的值。

注释:
  • 如要仅根据时间间隔记录变量,请将 增量 设为零。

 
action_zoom_plus_stroke 具有增量的间隔趋势日志示意图。
图: 具有增量的间隔趋势日志示意图。

如果间隔趋势日志具有增量和使用周期的计算方法,请确保周期包含必要的记录数以生成正确的计算。如果值和之前记录的值之差不超过周期内的增量,则不会针对计算记录值或只记录较少的值。

注释:
  • Adapt the period so it contains the required amount of records to generate a correct calculation.

  • If a calculation method is connected to an interval trend log with delta, make sure that the period and delta are adapted for the calculation.

间隔趋势日志仪表功能

可通过初始仪表设置来创建间隔趋势日志。间隔趋势日志支持仪表更改命令和仪表消费计算。您可在间隔趋势日志对象上查看上个仪表更改信息。 有关更多信息,请参阅 仪表功能 .

如要配置间隔趋势日志
  1. 在 WorkStation 的 系统树 窗格中,点击想要配置的间隔趋势日志。

  2. 文件 菜单中,点击 属性

  3. 在属性对话框中,点击 基本 标签。

  4. 编辑基本属性:

    表格: Interval Trend Log Properties - Basic Tab

    Property

    Description

    Status

    Displays the status of the trend log.

    Enabled

    Displays True if the trend log is enabled.

    Logged variable

    Enter the variable you want to log.

    Delta

    Select the minimum value change that triggers a new record.

    有关更多信息,请参阅 Interval Trend Log Delta .

    Activation variable

    Enter the variable that makes the trend log start recording values when the variable is True .

    有关更多信息,请参阅 Trend Log Activation .

    Activation time

    Specify the time when the trend log is to start recording values.

    有关更多信息,请参阅 Trend Log Activation .

    Interval

    Type how often to log the variable. The interval defines the time between two log records.

    Log size

    Select the number of records to store before old records are overwritten, including internal records generated by the trend log.

    有关更多信息,请参阅 日志记录存储 .

    Clear when enabled

    Select True to clear the trend log when it is enabled.

  5. 点击 仪表信息 标签。

  6. 编辑仪表属性:

    表格: Meter Info Tab

    Property

    Description

    Is meter log

    Select True if the trend log meter function is active.

    有关更多信息,请参阅 仪表功能 .

    Meter change time

    Enter the time when the meter was changed.

    Meter change user

    Enter the name of the user account that changed the meter.

    End time

    Enter the time when the old meter was replaced.

    End value

    Enter the value the old meter had when it was replaced.

    Start time

    Enter the time when the new meter was installed.

    Start value

    Enter the value of the new meter when it was installed.

    Meter constant

    Enter the constant of the new meter. If the meter counts in kilo (10 3 ), the constant is 1000.

    Min value

    Enter the first value of the new meter after roll-over.

    Max value

    Enter the last value of the new meter before roll-over.

  7. 点击 确定

  • 间隔趋势日志
  • Interval Trend Log Properties – Basic Tab
  • Configure Dialog Box – Configuration Tab
  • Interval Trend Log Delta
  • Trend Log Activation
  • 配置对话框 – 操作标签
  • 日志记录存储
  • 仪表功能
  • 编辑间隔趋势日志的间隔
  • Editing the Delta in an Interval Trend Log
  • Trend Log Does Not Start Record Due to the Start Condition