gefran 40A 48 User Manual page 6

Normal absolute alarm
AL2
AL1
(*)
alarm 1
alarm 2
For AL1 inverse absolute alarm (min.) with positive H1, 1 t = 1
(*) = OFF if disabling on power-on exists
For AL2 direct absolute alarm (max) with negative H2, 2 t = 0
Normal deviation alarm
(AL1 absolute, AL2 relative)
AL1+AL2
AL1
alarm 1
alarm 2
For AL1 direct absolute alarm (max) with negative H 1, 1 t = 0
For AL2 direct relative alarm (max) with negative H2, 2 t = 2
• Filter - outputs with reference to parameters F.0 and r.A
DON = Delayed activation
Alarm
setpoint
Variable
Output
Alarm
rA
DOF = Delayed deactivation
Alarm
setpoint
Variable
Output
Alarm
rA
6
6 • ALARMS
AL2 + H2
AL1 + H1
tempo
AL1 + AL2 + H2
AL1 + H1
tempo
The diagrams refer to a normal absolute alarm with hysteresis H = 0
F.0 = 1
rA
time
t < rA
F.0 = 3
rA rA
time
Symmetrical absolute alarm
AL1
inverse
direct
For AL1 inverse absolute, symmetrical alarm with hysteresis H1, 1 t = 5
For AL1 direct absolute, symmetrical alarm with hysteresis H1, 1 t = 4
Symmetrical deviation alarm
(AL1 absolute, AL2 relative)
AL1+AL2
AL1
AL1-AL2
alarm 1
alarm 2
For AL1 direct absolute alarm (max) with negative H1, 1 t = 0
For AL2 symmetrical deviation alarm H2, 2 t = 6
DBI = Delay in turning on output after output is
Alarm
setpoint
Variable
Output
Alarm
rA
DP0 = Delayed activation only at power-on
Alarm
setpoint
Variable
Output
Alarm
rA
81661G_MHW_40A48-96_09-2016_ENG
AL1 + [ H1 ]
AL1 - [ H1 ]
tempo
AL1+AL2+H2
AL1+H1
tempo
F.0 = 2
turned off
t < rA
time
t > rA
F.0 = 4
time