Alarm Parameter Module (4-AL) (Optional)
The controller may be equipped with one or two optional alarms. On some
models alarm output #1 is the same output as main control O1. In this case, the
output is either programmed for the main output control function (O1) or as an
alarm function (A1). This is set by alarm #1 action parameter (Act1).
If heat is selected, the remaining Alarm 1 parameters do not appear.
To enable the cooling output of the controller, select CooL for Alarm 2
action (Act2). The controller then utilizes the alarm 2 output as the cooling
output (O2). Front panel annunciator A2 illuminates whenever the cooling
output is on. See Cooling Output Module (5-O2), page 42, for configuration
of the cooling output.
If cooling is selected, the remaining Alarm 2 parameters do not appear.
Alarm Action (Act1, Act2)
Note: When deviation low-acting with positive alarm value (d-LO), deviation
high-acting with negative value (d-HI), or Band inside-acting (b-IN) is
selected for the alarm action, the indicator is “OFF” when the alarm output
is “ON”.
Caution: In applications where equipment or material damage, or risk
to personnel due to controller malfunction could occur, an
independent and redundant temperature limit indicator with alarm
outputs is strongly recommended. The indicators should have input
sensors and AC power feeds independent from the other equipment.
The configuration options of the alarm output are model dependent.
(Act1) - Alarm #1
(Act2) Alarm #2
A-HI
Absolute High Acting
A-HI
Absolute High Acting
A-LO
Absolute Low Acting
A-LO
Absolute Low Acting
d-HI
Deviation High Acting
d-HI
Deviation High Acting
d-LO
Deviation Low Acting
d-LO
Deviation Low Acting
b-In
Band Inside Acting
b-In
Band Inside Acting
b-Ot
Band Outside Acting
b-Ot
Band Outside Acting
Heat *
Assigns output 01/A1
as control output
CooL *
Assigns 02/A2 as cooling
or second output
*
Model Number Dependent.
Note: Deviation and band type alarms track both local and remote setpoint.
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