
80224_MHW_650 L - 1250 L_07-2018_ENG - 74
5.3. Alarms
5.3.1. Generic alarms AL2-4
Note: AL1 is latched and only used for high limit control. Reset is required
AL3
AL2
AL2
AL3+H3
AL2 +[H2]
AL2 - [H2]
AL2+H2
AL2+H2
AL2 + AL3
AL2 + AL3 + H3
AL2 + AL3
AL2 + AL3 + H3
AL2 + AL3
AL2
AL2
AL2+H2
(*)
Alarm 2
Normal absolute alarm
Symmetrical absolute alarm
Normal deviation alarm
(AL2 absolute, AL3 relative)
For AL2 inverse absolute alarm (min.) with positive H2, A2 t = 1
(*) = OFF if disabling on power-on exists
For AL3 direct absolute alarm (max) with negative H3, A3 t = 0
For AL2 inverse absolute, symmetrical alarm with hysteresis H2, A2 t = 5
For AL2 direct absolute, symmetrical alarm with hysteresis H2, A2 t = 4
For AL2 direct absolute alarm (max) with negative H2, A2 t = 0
For AL3 direct relative alarm (max) with negative H3, A3 t = 2
For AL2 direct absolute alarm (max) with negative H2, A2 t = 0
For AL3 symmetrical deviation alarm H3, A3 t = 6
Symmetrical deviation alarm
(AL2 absolute, AL3 relative)
time
time
time
time
Alarm 2
Alarm 3
Alarm 1
Alarm 2
Alarm 3
inverse
direct
5. EXAMPLES AND APPLICATION NOTES