Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers
Instruction Manual
27
Alarm (
ALARM
)
Alarm outputs may be assigned to the rate, total,
grand total, or the digital input. When assigned to the
rate, the alarm may be set as either a high alarm or a
low alarm. Alarm actions (
AUTO
,
AUTO.MAN
,
LATCH
,
L-CLEAR
) determine how and when the alarm should
be reset. They operate as follows:
•
Automatic (
AUTO
):
Alarm will reset automat-
ically once the alarm condition has cleared.
•
Automatic/Manual (
AUTO.MAN
):
Alarm will
reset automatically once the alarm condition
has cleared but can also be reset using the
Enter
button (or whichever function key is
set to acknowledge).
•
Latching (
LATCH
):
Alarm will
not
reset auto-
matically even if the alarm condition has
cleared. Press the
Enter
button at any time
to acknowledge the alarm.
•
Latching with Reset after Clear (
L-CLEAR
):
Alarm must be reset manually and can only
be done so after the alarm condition has
cleared. Press the
Enter
(ACK) button after
the alarm condition has cleared to reset the
alarm.
If the alarm is set to rate, a set and reset point must
be programmed. The set point is the display value at
which the alarm will turn on and the reset point is the
display value at which the alarm will turn off. If the set
point is lower than the reset point, the alarm will be a
low alarm; if the set point is higher than the reset
point, the alarm will be a high alarm. If the alarm is set
to total or grand total, only a set point needs to be
programmed. The digital input alarm will trigger when-
ever the digital input is triggered.
For all alarms, a delay before the alarm is turned on
or off may be set, as well as a failsafe feature which
will inverse the on/off programming.
Alarm states will be displayed on the meter even if no
relay output is physically connected. The alarm indi-
cator (!) (only on meters with no bargraph) will display
as well as optional red LED backlight, flashing rate,
total, or grand total value (rate, total, or grand total
alarms only), and a programmable alarm message.
Sample (
SAMPLE
)
A relay set to sample will trigger when the total or
grand total value has incremented by a programmed
amount. The relay can be programmed to stay on for
a specified amount of time.
For example:
if a relay is set to sample the total with
a
COUNT
of 1,000 and a
TIME
of 10 seconds, the re-
lay will engage for 10 seconds whenever the total has
incremented by 1,000 (e.g. 1000, 2000, 3000).
Timer (
TIMER
)
The timer output may be set to generate the timed
pulse only once (
ONESHOT
) or continuously (
CONT
).
The timer output produces a constant width pulse at a
constant frequency, if set as continuous timer. Pro-
gram the
Off Delay
(
OFF.DLAY
) from 1 second to 99
hours 59 minutes and 59 seconds. This is the time it
takes from selecting
START
to turning on the output
and for how long the output is off in continuous mode.
Program the
On Time
(
ONTIME
) for the active low
pulse from 1 second to 99 hours 59 minutes and 59
seconds (pulse width). This is the period of time for
which the output will remain on.
Select
Start
(
START
) to begin outputting the constant
timed pulse.
Select
Stop
(
STOP
) to end outputting the constant
timed pulse.
Function keys or the digital input may be assigned to
start and stop timer functions (see the
USER
menu in
Advanced
).
RLY 1
ALARM
ALARM
D.INPUT
ALARM
ACTION
ACTN
AUTO
ACTN
AUTO.MAN
ACTN
LATCH
ACTN
L-CLEAR
SET
+00,040.00
SET
GAL
Flashes
Units
ALARM
RESET
ALARM
SET
RESET
+00,030.00
ALARM
DELAY
DELAY
ON
TIME
0000 SEC
DELAY
OFF
TIME
0000 SEC
ALARM
FAILSAFE
Rate, Total, GTotal Alarm Only
FSAFE
OFF
ALARM
DISPLAY
RED
ON
FLASH
ON
ALARM
GTOTAL
Rate Alarm Only
Rate, Total, Gr.
ALARM
RATE
ALARM
TOTAL
MSG
ON
MSG
ALARM 1
Total Alarm Only
TOTAL
COUNT
COUNT
GAL
COUNT
0,001,000.0
SAMPL
TIME
TIME
0010 SEC
RLY 1
SAMPLE
SAMPL
TOTAL
SAMPL
GTOTAL
Flashes
Units
RLY 1
TIMER
TIMER
OFF.DLAY
TIMER
ON TIME
TIMER
MODE
TIMER
START
MODE
CONT
MODE
ONE.SHOT
H.MM.SS
00.01.00
H.MM.SS
00.00.01
TIMER
STOP
