User manual - DRR450
29
Upper deviation alarm (word 2018 = 3)
Pv
Comand Spv
Alarm Spv
Off
Off
On
On
Hysteresis
parameter
> 0
Time
Alarm
output
Alarm Spv
Comand Spv
Value of alarm setpoint
greater
than
“0”
and
hysteresis value greater than
“0” (Par. 20
a.1.H
> 0).
N.B.: with hysteresis less
than “0” (
a.1.H
< 0) dotted
line moves over the alarm
setpoint.
Pv
Comand Spv
Alarm Spv
Off
Off
On
On
Hysteresis
parameter
> 0
Time
Alarm
output
Comand Spv
Alarm Spv
Alarm Spv
Alarm Spv
Value of alarm setpoint less
than “0” and hysteresis value
greater than “0” (Par. 20
a.1.H
> 0).
N.B.: with hysteresis less
than “0” (
a.1.H
< 0) dotted
line moves over the alarm
setpoint.
Lower deviation alarm (word 2018 = 4)
Pv
Comand Spv
Alarm Spv
Off
Off
On
On
Hysteresis
parameter
> 0
Time
Alarm
output
Alarm Spv
Value of alarm setpoint
greater
than
“0”
and
hysteresis value greater than
“0” (Par. 20
a.1.H
> 0).
N.B.: with hysteresis less
than “0” (
a.1.H
< 0) dotted
line moves under the alarm
setpoint.
Summary of Contents for DRR450
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