6.6.1 Severity
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.
| 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.
