Function Blocks
3/99 Function Block Reference Guide 21
2.6 ALM Function Block,
continued
Configuration Parameters,
continued
Table 2-4 Analog Alarm Configuration Parameters
Properties Group Parameter Index# Parameter Description Value or Selection
Block Order
N/A Execution Order for Block
Read Only. See “Configure’
Menu, ”Execution Order” to
change.
Alarm Setpoint TYPE
N/A Alarm Action Type
PV>SP =
High Process
Variable/Local Setpoint
PV>CV =
High Process
Variable /Compare
Value
PV<SP =
Low Process
Variable/Local Setpoint
PV<CV =
Low Process
Variable /Compare
Value
(PV-CV)>SP =
High
Deviation Alarm
(CV-PV)>SP=
Low
Deviation Alarm
IPV-CVI>SP =
Band
Absolute Deviation
Alarm
Hysteresis
4 Hysteresis in engineering
units can be set from 0 to the
input span monitored
variable.
0 to 99999.9 in
Engineering Units
Local
Setpoint
0 Local Setpoint value in
engineering units or a
calculation from another
function block via RSP
(see “Use RSP Input”)
0 to 99999.9 in
Engineering Units
1 Remote Setpoint selection Click on box to use
Remote Setpoint (RSP)
Output LATCH
3 ON latches the alarm output
until acknowledged.
To acknowledge an alarm, it
must be tagged and entered
into an alarm group. This will
provide for the
acknowledgment from th
e
operator interface.
Click on Box to select
ON DELAY
6 Number of seconds the
alarm is active before
activating OUT.
0 to 240 seconds