Danfoss VLT FC 102 Programming Manual page 249

Parameter Descriptions
3.23.6 25-9* Service
Parameters used if there is a service on 1 or more of the
pumps controlled.
25-90 Pump Interlock
Array [10]
Option: Function:
In this parameter, it is possible to
disable 1 or more of the fixed lead
pumps. For example, the pump is
not selected for staging on even if
it is the next pump in the
operation sequence. It is not
possible to disable the lead pump
with the pump interlock command.
The digital input interlocks are
selected as [130] Pump 1 Interlock –
[132] Pump 1 Interlock in parameter
group 5-1* Digital In/Out.
[0] Off The pump is active for staging/
*
destaging.
[1] On The pump interlock command is
given. If a pump runs, it is
immediately destaged. If the pump
does not run, it is not allowed to
stage on.
25-91 Manual Alternation
Range: Function:
0 [ 0 - par. Readout parameter for the actual
*
25-06 ] variabl-speed pump in the system.
When an alternation takes place,
the lead pump parameter is
updated to reflect the current
variable-speed pump in the system.
If no lead pump is selected
(cascade controller disabled or all
pumps interlocked), the display
shows N1.
M0010001
Programming Guide
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