DataLoop™ LI23 Loop-Powered Process Meter
Instruction Manual
32
MN302100 Rev 3
Pump Alternation (
ALTERN
)
Pump alternation sets the two relays to alternate every time the first
on
point (
ON 1
) is reached. The active
relay will turn off once the first
off
point (
OFF 1
) is reached. If the PV reaches the second
on
point (
ON 2
),
the other relay will also turn on. The second relay will turn off once the second
off
point (
OFF 2
) is reached
and the first relay will remain active until the first
off
point (
OFF 1
) is reached.
On and off delays may optionally be programmed for each
on
and
off
point in order to delay the activation
or deactivation of the relays by a certain number of seconds after reaching either the
on
point or
off
point.
For pumps that typically remain on extensively, the alternation time (
ALT.TIME
) parameter sets a period of
relay on-time after which the relays should alternate. For example, if the alternation time is set to 1 hour,
the active relay will deactivate after 1 hour of runtime and the inactive relay will activate.
RLY 1
PUMPCTRL
PUMP
DELAY2
DELAY
ON
TIME
0000 SEC
DELAY
OFF
TIME
0000 SEC
ON 2
+00,090.00
ON 2
GAL
Flashes
Units
OFF 2
GAL
OFF 2
+00,080.00
Flashes
Units
ON 1
+00,070.00
ON 1
GAL
Flashes
Units
OFF 1
GAL
OFF 1
+00,060.00
Flashes
Units
PUMP
DELAY1
DELAY
ON
TIME
0000 SEC
DELAY
OFF
TIME
0000 SEC
PUMP
ALT.TIME
000.00
HHH.MM
PUMP
ON-OFF
PUMP
ALTERN
