MultiTrode MultiSmart Installation & Operation Manual page 170

MultiSmart Installation & Operation Manual
24.3.1.6 IsPumpAvailable
Pumps become unavailable due to critical faults. For example, a Motor Over-Temperature fault will cause
the pump to be locked out by default, so that it cannot be run. Other faults (e.g. Contactor Auxiliary) do not
cause the pump to be locked out. The IsPumpAvailable function block returns whether a specified pump
is currently available to be run. It received a pump number (1,2,3...) as an input, and returns a Boolean
result specifying whether the selected pump is available.
24.3.1.7 NextPumpRunning
This function block returns whether a specified pump is currently running. It receives a pump number
(1,2,3...) as an input, and returns a Boolean result specifying whether the selected pump is running.
24.3.1.8 NextPumpToRun
This function returns the pump number (1,2,3...) of the next pump which will be run. This takes into account
any pump alternation scheme defined in the unit.
24.3.1.9 NumRunningPumps
This function returns the number of currently running pumps which are managed by the MultiSmart.
24.3.1.10 PumpAuto
This function block can be used to place a pump into AUTO mode. It receives a pump number as an input,
as well as a Boolean variable which defines whether the function block should be activated. It returns a
Boolean result, indicating whether the operation was successful.
24.3.1.11 PumpHoldout
As of MultiSmart version 2.0.0, a new Holdout fault has been defined. This fault can be used to hold out a
pump without "faulting" it. (i.e. There is to fault indication on the unit). The PumpHoldout function block can
be used to activate this condition. However, its operation depends upon the unit being configured
appropriately.
This function block actually writes to the source of the PumpHoldout fault. If the source is not defined, then
this action will have no affect. As well, if the source is defined to be a digital input, then the value of the
digital input will override any attempt made by this function block to modify the source. Therefore, if use of
this function block is desired, then the source of the PumpHoldout fault should be set to a digital tag not
defined by a physical input. The tags defined under Isagraf5.Values are most appropriate for this
purpose. In order to do this, first go to the Advanced screen. Then navigate to:
FaultModule->Pump->Pump_n->Pump Holdout->Status
The highlight Source and press the middle left button. Then navigate to Isagraf5.Values and select
one of the digital tags (e.g. Digital01). Then press OK.
The PumpHoldout function block can then be used to hold out the pump. The function block receives a
pump number as an input, as well as Boolean variable which defines whether activate or clear the holdout
condition. It returns a Boolean result, indicating whether the operation was successful.
24.3.1.12 PumpManual
This function block can be used to place a pump into MANUAL mode. It receives a pump number as an
input, as well as a Boolean variable which defines whether the function block should be activated. It returns
a Boolean result, indicating whether the operation was successful.
24.3.1.13 PumpOff
This function block can be used to place a pump into OFF mode. It receives a pump number as an input, as
well as a Boolean variable which defines whether the function block should be activated. It returns a
Boolean result, indicating whether the operation was successful.
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