As defined by OPC 10000-5, all events shall have a severity assigned to them. This specification specifies specific severity ranges for some events. If no specific severity or severity range is provided for a defined event or condition, the manufacturer or integrator may choose from the default OPC UA range. The chosen severity when assigning it to a condition or event shall match the following categorization.
Table 10 – Severity Categorization
|
Severity |
Lower limit |
Upper limit |
|
HIGH |
801 |
1000 |
|
MEDIUM HIGH |
601 |
800 |
|
MEDIUM |
401 |
600 |
|
MEDIUM LOW |
201 |
400 |
|
LOW |
1 |
200 |
Figure 13 shows examples on how alarms and conditions shall be used in a Compressed Air System.
Figure 13 – Alarms and Conditions