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4/00 UDC 3300 Controller Product Manual 171
5.11 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 at the rear terminals. See Table 2-8 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 Section 3 –
Configuration for details.
Procedure for
displaying the alarm
setpoints
Table 5-20 lists the procedure for displaying and changing the alarm
setpoints.
Table 5-20 Procedure for Displaying or Changing the Alarm Setpoints
Step Operation Press Action
1
Access the
Alarm Set Up
group
SET UP
until you see:
ALARMS
Lower Display
SET UP
Upper Display
2
Access the
Alarm Setpoint
Values
FUNCTION
LOOP 1/2
to successively display the alarm setpoints
and their values. Their order of appearance
is shown below.
Lower Display
Upper Display
The alarm setpoint
value
A1S1 VAL = (Alarm 1, Setpoint 1 value)
A1S2 VAL = (Alarm 1, Setpoint 2 value)
A2S1 VAL = (Alarm 2, Setpoint 1 value)
A2S2 VAL = (Alarm 2, Setpoint 2 value)
or
to change any alarm setpoint value you
select in the upper display.
3
Return to normal
operation
LOWER
DISPLAY