Super Systems 31095 - Operation: Alarm Features; Loop Break Alarm (LBA) Function

mA
°C
OP1
275.0
A / M
1 2 3
Ilba
4
33
4 - Operation
[C] START-UP DISABLING
∆SP
Disable
SP
On
Off
Start-up
ramp
down
ramp
up
∆SP
threshold
=
SP± range
Disable
SP
∆SP
On
Off
Start-up
Bloc
Yes
LOOP BREAK ALARM (LBA)
When the controller connection to
the sensor is discontinued or
other faults are detected in the
control loop, AL1 alarm becomes
active after a predefined time of
1... 9999 s from the detection of
the failure (see page 37).
When a sensor failure occours,
the LBA interventrion is immedi-
ate. The alarm state ceases when
the fault condition is no longer
present.
eIn case of ON-OFF control, the
LBA alarm is not active.
[D] ALARM DISABLING AT SENSOR BREAK
PV
Process
variable PV
AL1
#donb = no
#-FS.H = 300°C
Sensor
break
Sensor
replacement
AL1
#donb = yes
#Sc.Hi = 500°C
For those alarms that are configured to be different than LBA, it is possible
to set the parameter
#donb (disable on break).
Set:
no To maintain the alarm status when a sensor break is detected.
yes To disable the alarm intervention when a sensor break is detected. Once
the sensor has been changed, the alarms that were active before the
sensor break are activated again
.
X5-SSI-uk 18-03-2009 17:53 Pagina 33