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
LOOP BREAK ALARM LBA
When the controller connection to
the sensor is discontinued or other
faults are detected in the control
loop, the 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 immediate. 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 alarm that are configured to be different than LBA, 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-uk-ed5 17-09-2009 14:53 Pagina 33
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