Operation
66 UDC2300 Controller Product Manual 12/00
6.10 Alarm Setpoints
Introduction
An alarm consists of a relay contact and an operator interface indication. The alarm relay
is de-energized if setpoint 1 or setpoint 2 is exceeded.
The alarm relay is energized when the monitored value goes into the allowed region by
more than the hysteresis.
The relay contacts can be wired for normally open (NO) energized or normally closed
(NC) de-energized using internal jumper placement. See Table 2-4 in the Section 2 –
Installation for alarm relay contact information.
There are four alarm setpoints, two for each alarm. The type and state (High or Low) is
selected during configuration. See Subsection 4.13 – Configuration for details.
Alarm Setpoints Display
Table 6-13 Procedure for Displaying Alarm Setpoints
Step Operation Press Result
1
Select Alarm
Set-up Group
SET UP
Until you see:
Upper Display = SET
Lower Display = ALARMS
2
Access the Alarm
Setpoint Values
FUNCTION
To successively display the alarm setpoints and their values.
Their order of appearance is shown below.
Upper Display = (the alarm setpoint value)
Range values are within the range of the selected
parameters except:
DEVIATION (DE) value = PV Span
EVENTS (E-ON/E-OF) value = Event Segment Number
PV RATE OF CHANGE (PVRT) = The amount of PV change
in one minute in engineering units.
LOOP BREAK ALARMS (BRAK) = The timer value may be
changed only for controllers configured for ON/OF.
Lower Display = A1S1VA = Alarm 1, Setpoint 1
A1S2VA = Alarm 1, Setpoint 2
A2S1VA = Alarm 2, Setpoint 1
A2S2VA = Alarm 2, Setpoint 2
NOTES:
With 3 position step control, the alarms set for “output”
will not function.
MAN, RSP, AND FSAF selections do not have setpoint
values.
3
Change a value [▲] [▼] To change any alarm setpoint value in the upper display.
4
Return to Normal
Display
DISPLAY
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