Download SX27 Series Process Controller

FX27.ed0
3-07-2008
15:52
Pagina 31
4 - Operations
L
# tch
ALARM
ACKNOWLEDGE FUNCTION
The alarm, once occurred, is presented on the display until to the
time of acknowledge.
The acknowledge operation consists in pressing any key.
After this operation, the alarm
leaves the alarm state only when
the alarm condition is no longer
present.
b
# loc
ALARMS WITH LBA (LOOP BREAK ALARM)
AND SENSOR BREAK OPERATION
Select the code 1 on n or o configuration indexes (see pages 18 or
19). The following parameter is then available:
#t.LbA
LBA delay
Setting a value between 1 and
9999 s the alarm works as
LBA+Sensor break with delay [1]
This condition is shown by means
a red led as well as the blinking PV
display.
START-UP DISABLING
Ramp down
____
8888
274.8
Disable
∆SP
SP
On
Off
Setting OFF the alarm works as
Sensor break with immediate
action.
This condition is shown by means
the red led of the selected alarm as
well as:
275.0
275.0
8888
---or
275.0
OP1
Start-up
Ramp up
SP
∆SP
mA
Disable
°C
Note [1] In case of sensor break, condition, the alarm action is immediate.
On
Off
Start-up
∆SP Threshold = SP ± range
When the cause of the alarm disappears, the alarm status stops.
31