
SuperNova PD500 PID Process & Temperature Controllers
Instruction Manual
39
Alarm Group (G.ALM)
The Alarm Group contains parameters to establish
alarm conditions for up to four alarms. These alarms
may be assigned to the SUB1 or SUB2 alarm output
relays.
This group also contains the programming of the loop
break alarm (LBA). This is a special type of alarm that
can be assigned to a Sub relay.
During programming of the Alarm Group, references
to “n” in the programming menus refers to the number
1, 2, 3, or 4; the alarm number the parameter applies
to. For example, An.TY could appear as A1.TY,
A2.TY, A3.TY, or A4.TY, each referring to alarm 1, 2,
3, and 4.
Only alarm numbers or LBA settings assigned to the
SUB1 or SUB2 relay in the Sub Relay Group (G.SUB)
will appear in the Alarm Group (G.ALM). Alarm
numbers or LBA settings that are not assigned to a
Sub relay will retain their programming and appear in
the G.ALM menu if again assigned to a Sub relay.
Alarm Number n Type (An.TY)
With An.TY, you can choose between 'Alarm off' and
13 alarm types listed in the
Alarm Type and Number
Table.
Each type is divided into absolute alarm and deviation
alarm, with or without standby mode.
An.TY
No.
Alarm Name
Absolute
Value or
Deviation
Alarm
Standby
0
Alarm Off
Deviation
1
High Absolute
Absolute
2
Low Absolute
Absolute
3
High Deviation
Deviation
4
Low Deviation
Deviation
5
High-Low
Deviation
Deviation
6
High-Low Range
Deviation
7
High absolute with
standby sequence
Absolute
Yes
8
Low absolute with
standby sequence
Absolute
Yes
9
High deviation with
standby sequence
Deviation
Yes
10
Low deviation with
standby sequence
Deviation
Yes
11
High-Low deviation
with standby
sequence
Deviation
Yes
12
High-Low range
with standby
sequence
Deviation
Yes
13
Sensor error
Absolute
Figure 26. Alarm Type and Number Table
Alarm Number n Value (AL-n)
The AL-n parameter sets the alarm value for alarms
1, 2, 3, or 4; as indicated in the “n” position of the
parameter name.
When the alarm is set as an absolute value alarm, the
setting can be any value within the limits of the input
type. AL-n is entered as the displayed value, in
displayed engineering units, at which the alarm is to
turn on.
When the alarm is set as a deviation alarm, the
setting can be 0 to 100% of the full range of the input,
and is entered in the displayed engineering units, but
the number represents the absolute value of the
deviation amount at which the alarm turns on.
For example, when a type K thermocouple is used,
and the alarm type is set as a high absolute (An.TY
set to 1), the setting range of AL-n cab be -200°C to
1,370°C
When the alarm type is set as a high deviation (An.TY
is set to 3), the setting range of AL-n can be 0.0°C
to
1,570.0°C.
Alarm Number n Deadband (An.DB)
The alarm deadband is the different between the set
and reset points of an alarm. An.DB is entered as the
deadband for the alarm, entered in displayed
engineering units. The alarm deadband can be set as
0 to 100% of the full range of the input, regardless of
the alarm being an absolute or deviation alarm