User manual - DRR227 -
25
Band Alarm (
b. aL.
selection)
1
Alarm Spv
Off
Off
Off
Hysteresis
parameter
> 0
Time
Alarm
output
Alarm Spv
Band alarm hysteresis value greater
than “0” (Par.29
A.1.HY.
> 0).*
2
Alarm Spv
Off
Off
On
On
On
Hysteresis
parameter
< 0
Hysteresis
parameter
Time
Alarm
output
Alarm Spv
Comand Spv
Band alarm hysteresis value less than “0”
(Par.29
A.1.HY.
< 0).*
* The example refers to alarm 1; the function can also be enabled for alarm 2.
Upper Deviation Alarm (
H.d.aL.
selection)
1
Pv
Comand Spv
Alarm Spv
Off
Off
On
On
Hysteresis
parameter
> 0
Time
Alarm
output
Alarm Spv
Comand Spv
Upper deviation alarm value of alarm
setpoint greater than “0” and hysteresis
value greater than “0” (Par.29
A.1.HY.
> 0).**
2
Pv
Comand Spv
Alarm Spv
Off
Off
On
On
Hysteresis
parameter
> 0
Time
Alarm
output
Comand Spv
Alarm Spv
Alarm Spv
Alarm Spv
Upper deviation alarm value of alarm
setpoint less than “0” and hysteresis
value greater than “0” (Par.29
A.1.HY.
> 0).**
