About Alarm Strings
You use Alarm Strings to name alarm states. An alarm displays the string for its alarm state when %State is included in the alarm message.
Alarm messages are configured in the Point Properties and Alarm Definition dialog boxes.
- Analog point alarm strings.
- Digital point alarm strings.
- Alarm string sets.
Analog point alarm strings
For analog points, you can define up to four alarm values for a point. Each value corresponds to an alarm state; each state has a corresponding alarm string:
| Point Value | Alarm State | %State field Display |
|---|---|---|
| Greater than or equal to Alarm High. | Alarm High | Alarm High Msg |
| Greater than or equal to Warning High and Less than Alarm High. | Warning High | Warning High Msg |
| Less than or equal to Warning Low and Greater than Alarm Low. | Warning Low | Warning Low Msg |
| Less than or equal to Alarm Low. | Alarm Low | Alarm Low Msg |
| Less than Warning High and Greater than Warning Low. | Normal | Normal Msg |
Digital point alarm strings
For digital points, only one alarm state can be defined. That is, a digital point is in alarm state when it is either 1 or 0. Otherwise, the point's value is in the Normal state. Also, note the following:
| Point Value | Alarm State | %State field Display |
|---|---|---|
| 1 | Alarm state | Alarm High Msg |
| 0 | Alarm state | Warning High Msg |
Alarm string sets
An index number, which is specified when a set is defined, identifies each set of alarm strings. You can configure up to 99 alarm string sets, numbered 1 through 99. When you configure a point you can select the set that applies to the point for inclusion in the point's alarm message.
The CIMPLICITY default configuration includes a set of alarm strings for Index number 1. The Index number 1 alarm string is the default when you add a device point. This string may be modified but should never be deleted.