Despatch MIC1462 Controller Manual - Manual (Page 64)

60
STEP DESCRIPTION MESSAGE
DISPLAY FUNCTION AVAILABLE SETTING
4d Deviation
(High/Low)
Alarm 1 value DeAlarm 1 If Alarm 1 is a Deviation High/Low
alarm, gives a value above (positive
value) or below (negative value) the
setpoint. If the process variable
deviates from the setpoint by a
margin greater than this value, the
alarm becomes active ± (input range) from
setpoint. Default =
five input range units.
5 Alarm 1
Hysteresis
value Al1 Hyst Value defines a hysteresis band on
the “safe” side of the alarm 1 value 1 unit to X units,
where X = 10% of
input span
6a Process High
Alarm 2 value HiAlarm 2 If Alarm 2 is a Process High alarm,
the value of process variable at or
above which Alarm 2 will be active Input Range Max. to
Input Range Min.
Default = Input Range
Max.
6b Process Low
Alarm 2 value LoAlarm2 If Alarm 2 is Process Low Alarm, the
value of process variable at or below
which Alarm 2 will be active Input Range
Max. to Input
Range Min.
Default =
Input Range Min.
6c Band Alarm 2
value BaAlarm2 If Alarm 2 is a Band Alarm, the band
of process variable values (centered
on the setpoint) outside which the
process variable will cause this alarm
to be active. ± (input span) from
setpoint. Default =
five input units.
6d Deviation
(High/Low)
Alarm 2 value DeAlarm 2 If Alarm 2 is a Deviation High/Low
Alarm, gives a value above (positive
value) or below (negative value) the
setpoint. If the process variable
deviates from the setpoint by a
margin greater than this value, the
alarm becomes active. ± (input range) from
setpoint. Default =
five input range units
7 Alarm2
Hysteresis
Value Al2 Hyst A non-zero value defines a hysteresis
band on the “safe” side of the Alarm 2
value 1 unit to X units,
where X = 10% of
input span
8 Loop Alarm
Enable Loop Alm Enables/disables Loop Alarm EnAb
disA
Default = disA
9 Loop Alarm
Time LpAtime If ON/OFF control is selected (i.e.
PB1=0) and Loop Alarm is enabled,
this defines the duration of the
saturation condition after which the
Loop Alarm is activated. 1 second to 99
minutes 59 seconds.
Default = 99 minutes
59 seconds