Pixsys DRR245 - Lower Deviation Alarm

52 - DRR245 - User manual
13.e Lower Deviation Alarm (
L. d .AL.
selection)
1
Pv
Comand Spv
Alarm Spv
O O
Hysteresis
parameter
 > 0
Time
Alarm
output
Alarm Spv
Lower deviation alarm value of
alarm setpoint greater than “0” and
hysteresis value greater than “0” (par.
28
A.1.HY.
> 0).
N.B.**
2
Pv
Comand Spv
Alarm Spv
O O
On On
Hysteresis
parameter
 > 0
Time
Alarm
output
Comand Spv
Comand Spv
Comand Spv
Comand Spv
Alarm Spv
Alarm Spv
Lower deviation alarm value of alarm
setpoint less than “0” and hysteresis
value greater than “0” (par. 28
A.1.HY.
> 0).
N.B.**
** a) The example refers to alarm 1; the function can also be enabled for alarms 2 and 3 on models
that include it. b) With hysteresis value less than “0” (
A.1.HY.
< 0) the broken line moves under
the alarm setpoint.