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Version 1.3 11/12/11
32
C o r p o r a t io n
High / Lo Level Restarts
.
This setting allows the operator to set the number of
times that the system can shutdown and then
automatically restart after a High (or Lo) Level Shutdown.
The range is from 0-250. Select 0 to make the system shut down immediately after the
High Level delay timer trips. This is the safest setting and the default for the system. After
each automatic restart the fault is logged in FAULT HISTORY an
d the message “New
Fault” appears on the main screen.
The restart number is based on a 1 hour time period. i.e. if the Restarts number is 5 then
the system will allow 5 restarts in the 1 hour time frame starting from the time of the first
High Level Fault.
Sensing Input
The SWO can accommodate a variety of
inputs. It is divided in to two categories.
•
Analogue-
These are signals which change
proportionally over time. Most sensors and transducer have an analogue
output. Analogue is also divided in to two categories.
o
Standard Analogue-
This is where a level rise will cause a rise in
the output of the transducer.
o
Reverse Analogue-
This is where a level rise will cause a fall in the
output of the transducer. (These are very rare in level control
applications and will depend if tank filling or emptying selected)
•
Switched-
These are signals which change instantaneously. Typical switched
products are: Floats, level switches and toggle switches.
Excess Run / Cycle Protection
There are two options to prevent excessive pump
cycling or starting.
•
Min Run Time-
If this setting is used then
each pump is prevented from stopping until
the it’s own Minimum run timer times out.
This method of protection should only be
used if the reticulation system can withstand maximum pump head. A message
will appear on the status screen letting you know that it has occurred.
•
Max Starts perHr-
If this setting is used
then
each pump from starting if the Max
starts per hour setting has been exceeded.
The down side of this is that if all pumps
have exceeded the number of starts per hour then the reticulation pressure will
fall to zero. A message will appear on the status screen letting you know that it
has
Sensing Input
Analogue
ExcessRun Prot’n
Min Run Time
Hi (Lo) Level
Restarts
XXX
Min Run Time ON
Pump Stop X Secs
PUMP/S REACHED
MAX Starts PerHr
