ABB C310 Programming Manual page 44

...4.11 Set Up Alarms Page
trIP
HYSt
More
alarms
MOrE
YES
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––––
– – – –
– – –
no
Trip Level
Set the trip value required for the alarm selected above.
The following are displayed in engineering units:
, ,
HPrC LPrC
and alarms have both positive and negative
HdEV LdEV
trip points. Refer to Fig. 4.11.
The following are displayed as percentages:
HOUt and LOUt.
The following are displayed as a percentage of span per
hour between ±0.5 and ±500%:
and
FrtE SrtE
The following are displayed as event numbers:
(1 to 9) and
PEVt
If the is set to
Alarm Type
are alpha, not numeric. The following codes are
selectable:
– Automatic
AUtO
– Manual
MANUAL
– Local set point
L–SPt
– Remote set point – only selectable if
r–SPt
Second set point type is Remote set
point
– Dual set point– only selectable if
dSPt
Second set point type is Dual set point
– process variable failure
PVFAIL
– Remote set point failure
rSFAIL
– position feedback failure
PNFAIL
– any input failure
INFAIL
– alarm activated when program is on
P–HOLd
Hold (Profile only)
If AUtO , MANUAL , L–SPt
and an attempt is made to use that facility (Automatic,
Manual, Local set point, Remote set point, or Dual set
point) the alarm is activated.
Hysteresis
The hysteresis is operational when the alarm is active.
Set the hysteresis value required (in engineering units),
between display full scale and zero, or percentage rate set
on rate alarms, in 0.1% increments. The alarm is activated
at the trip level but is only turned off after the alarm variable
has moved into the safe region by an amount equal to the
hysteresis value. Refer to Figs. 4.9 to 4.13.
More Alarms to be Programmed?
If there are, select
YES
Return to
Alarm Identities
parameter.
Continued on next page
4 CONFIGURATION...
and .
HdEV LdEU
.
(1 to 30).
SEVt
the displayed characters
MOdE
, r–SPt , or d–SPt
otherwise select
no
frame, or advance to the next
is selected
.
41