Channel limits

To monitor channel values you can define the channels limits that should not be crossed. Alarm events are triggered when signals cross the defined limits.

Options that are available in the channels tab:

  • Critical low
  • Critical high
  • Warning low
  • Warning high
  • Hold time [s]

Channel limit status can be displayed with the Overload indicator. There is also a possibility to add an alarm event on existing options:

  • Events on critical level
  • Events on warning level

For each channel in Dewesoft you can define the Hold time in [s]. This will hold the warning/critical status for an X amount of seconds after the channel falls below the limit. By default, the Hold time is set to Manual. Manual option will hold until a manual reset for the warning/critical status (orange/red color stays even after the event on the digital meter, holdtime 0 never resets until manual user reset).

The warning/critical status can be reseted individually for each channel or for all channels at the same time.

To reset the warning for each channel individually click on the channel with the right mouse button and select Reset OVL.

To reset the warnings for all channels at the same time, right click on the OVL warning at the top of the screen and select Reset OVL.

The option “Hysteresis (Value)” will hold the warning/critical status if the channel value falls below the defined limit for less then defined in Hysteresis column.

Warning and critical channel limits can also be displayed on Digital meter widget. For that, you need to enable the option Limit type to Alarm. When the signal value crosses warning limit, the color of the channel turns to orange and when the channel value reaches critial level, the color turns to red.

The color of warning (orange) or critical (red) level will also be shown on the digital meter until the reset of the warning.

The warning and critical channel limits can also be shown in the Recorder widget. The warning and critical channel limits are visible as horizontal lines. Warning limit is orange line and critical limits is represented by a red line.

The channel limints can be enabled by checking “Show alarm limits” property in Recorder Drawing options.

Alarm events can be displayed in Overload indicator or Tabular value display widget.

During storing mode, the alarm events are seen in the event list in the top right corner of measurement screen.