User manual

52 - UR4848 - User manual UR4848 - User manual - 53
Pv
Alarm Spv
O O O
On On On
Hysteresis
parameter
 < 0
Hysteresis
parameter
 < 0
Time
Alarm
output
Comand Spv
Band alarm hysteresis value less than
“0” (par. 28
A.1.HY. < 0).
NB
13
Upper Deviation Alarm ( H.d.AL. selection)
Pv
Comand Spv
Alarm Spv
O O
On On
Hysteresis
parameter
 > 0
Time
Alarm
output
Upper deviation alarm value of alarm
setpoint greater than “0” and hyste-
resis value greater than “0” (par. 28
A.1.HY. > 0).
NB
14
Pv
Comand Spv
Alarm Spv
O O
On On
Hysteresis
parameter
 > 0
Time
Alarm
output
Upper deviation alarm value of alarm
setpoint less than “0” and hysteresis
value greater than “0” (par. 28
A.1.HY.
> 0).
NB
14
13
The example refers to alarm 1; the function can also be enabled for alarms 2 and 3 on models
that include it.
Lower Deviation Alarm ( L.d.AL. selection)
Pv
Comand Spv
Alarm Spv
O O
On On
Hysteresis
parameter
 > 0
Time
Alarm
output
Lower deviation alarm value of alarm
setpoint greater than “0” and hyste-
resis value greater than “0” (par. 28
A.1.HY. > 0).
NB
14
Pv
Comand Spv
Alarm Spv
O O
On On
Hysteresis
parameter
 > 0
Time
Alarm
output
Lower deviation alarm value of alarm
setpoint less than “0” and hysteresis
value greater than “0” (par. 28
A.1.HY.
> 0).
NB
14
14
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.