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58
ATR 142 - User manual
Off
Off
Off
On
On
On
Hysteresis
parameter
< 0
Hysteresis
parameter
< 0
Pv
Alarm Spv
Command Spv
Time
Alarm output
Band alarm hysteresis value
less than “0” (Par.28
a .1.Hy .
< 0).
NB
: The example refers to
alarm 1; the function can
also be enabled for alarm 2
on model that include it.
Upper Deviation Alarm (
H.d.aL.
selection)
Off
Off
On
On
Hysteresis
parameter
> 0
Pv
Alarm Spv
Command Spv
Time
Alarm output
Upper deviation alarm value
of alarm setpoint greater
than “0” and hysteresis va-
lue greater than “0” (Par.28
a .1.Hy .
> 0).
NB
: a) The example refers to alarm 1; the function can also be
enabled for alarm 2 on model that include it.
b) With hysteresis less than “0” (
a.1.Hy.
< 0) the segmented line
moves above the alarm setpoint.
Off
Off
On
On
Hysteresis
parameter
> 0
Pv
Alarm Spv
Command Spv
Time
Alarm output
Upper deviation alarm va-
lue of alarm setpoint less
than “0” and hysteresis va-
lue greater than “0” (Par.28
a .1.Hy .
> 0).
Содержание ATR 142 Series
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