This example shows how alarm triggers and message trigger values work together to trigger alarms.
Set up the alarm triggers:
Trigger (tag name) |
Trigger type |
Tag address |
Trigger1 |
Bit |
N7:0 |
Trigger2 |
LSB |
N7:1 |
Trigger3 |
Value |
N7:2 |
Set up the alarm messages:
Trigger |
Value / bit |
Message |
<AllTriggers> |
1 |
High temp in vat area |
Trigger1 |
1 |
Vat 100 temp high |
Trigger2 |
1 |
Vat 101 temp high |
Trigger3 |
1 |
Vat 102 temp high |
At run time, these messages appear when the tag values (or bit positions) change to 1.
Notice that the <AllTriggers> message is configured to appear when any trigger’s value (or bit position) changes to 1.
Trigger and value |
Messages triggered |
Trigger1 = 0001 |
High temp in vat area Vat 100 temp high |
Trigger2 = 0003 |
High temp in vat area Vat 101 temp high |
Trigger3 = 0001 |
High temp in vat area Vat 102 temp high |