Xylem 704 PUMP CONTROLLER - Manual (Page 7)

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6.4Relay operating / not operating
Choose whether to have the relay operating or not
operating.
6.5 Relay controlling / alarm
Set whether the relay is to be an alarm relay or a pump
controlling relay.
When the relays are activated, the light emitting diodes
under the display will show, whether it is an alarm relay or
a control relay: When an alarm relay is activated the
diode will flash a red light; when a control relay is
activated the diode will flash a green light.
6.6.1 Relay level alarm / system error
If the relay is set for alarm relay, set the alarm to be a
level (high/low) alarm or an alarm for system error.
6.6.2 Relay NC / NO
Choose the relay function for the output, (Normally Open)
or (Normally Closed).
6.6.3 Relay set>reset (high) / set
Set the level alarm to be registered as a high or low
alarm. If the alarm needs to be a high alarm, choose set >
reset. If the alarm needs to be a low alarm choose set <
reset.
6.7.1 Relay alternating / directly controlled
The output relays can be set as directly controlled or
alternating. At direct control, the start and stop values
which have been keyed in for the individual relay activate
the outputs, nothing else activates them. At alternating
operation the alternating pumps will take it in turns to start
up in a cycle, so that when a start level is activated the
next relay in the cycle is activated. If several start levels
are passed several pumps will consequently be started.
6.7.2 Temporary operation
In this menu you choose whether the output relay, which
you have chosen for alternating operation, has to be
forced stopped after a given amount of time. Operating
hours before forced stop is chosen in menu 6.7.3. Please
note that if one output is stopped, the next output relay in
the alternation sequence will be activated as soon as start
level has been reached, and output delay has passed
through.
6.7.3 Stop after XXX minutes
If temporary stop is chosen in menu 6.7.2., key in the
operating hours that will cause a forced stop of the output.
The interval can be set from 1 – 999 minutes.
6.7.4Level not in use / in use
To avoid all pumps running at the same time in alternating
operation, levels can be left unused.
One level minimum, must be left “in use” for the pump
controller to function correctly. If the pump controller is set
up to alternate in pairs at least one of level 1 and 2 as well
as either level 3 or 4 must be left “in use”.
6.8 Relay delay
To avoid short error conditions, or levels continuously
activating the relays, a delay time can be set. If the
connected pumps are not started simultaneously for over
load reasons, the delay time can be set differently for the
relays.
In case of an error condition or level continuously
exceeding, the diode will flash. If the condition proceeds
after the delay time has expired the relay will be activated
and the diode will be permanently lit.
7.0 mA output programming
Set the voltage analog for the pump controller.
7.1 mA output 0-20mA / 4-20mA
Set the mA output as either a 4-20 mA signal or a 0-20
mA signal.
7.2 mA output 4-20mA / 20-4 mA
Set the voltage output to be either 4-20 mA signal or 20-4
mA signal.
If (0 or 4) - 20 mA is chosen, a high level will give a high
mA-signal and a low level a low mA-signal.
If 20 - (4 or 0) mA is chosen, a high level will give a low
mA-signal and a low level a high mA-signal.
7.3 mA output 4 mA = (elevation)
If 4-20 mA has been chosen in 7.2, key in which level the
low mA value represents. If 20-4 mA has been chosen,
the value represented by the high mA is set here.
7.4mA output 20 mA = (elevation)
If 4-20 mA has been chosen in 7.2, key in here which level
the high mA value represents. If 20-4 mA is chosen, key
in the value represented by the low mA.
8.0 Pump flow programming
At flow calculation a known volume between two levels is
programmed. The pump controller is then able to
calculate the flow from the measured level differences.
In the flow calculation the fact, that inlets can occur
simultaneously with pumping out is taken into conside-
ration.
To calculate flow the following conditions must be met: