Danfoss VLT HVAC Drive FC 102, Programming Manual, Page: 201 / 250

25-83 Relay Status
Range: Function:
0
*
[0 -
4 ] Readout of the status for each of the relays
assigned to control the pumps. Every element in
the array represents a relay. If a relay is activated,
the corresponding element is set to On. If a relay is
deactivated, the corresponding element is set to
Off.
25-84 Pump ON Time
Range: Function:
0 h
*
[0 -
2147483647 h] Readout of the value for pump ON time.
The cascade controller has separate
counters for the pumps and for the relays
that control the pumps. Pump ON time
monitors the operating hours of each
pump. The value of each pump ON time
counter can be reset to 0 by writing in the
parameter, for example, if the pump is
replaced in case of service.
25-85 Relay ON Time
Range: Function:
0
h
*
[0 -
2147483647
h] Readout of the value for relay ON time. The
cascade controller has separate counters for
the pumps and for the relays that control
the pumps. Pump cycling is always d1
based on the relay counters, otherwise it
would always use the new pump if a pump
is replaced and its value in
parameter 25-84 Pump ON Time is reset. To
use parameter 25-04 Pump Cycling , the
cascade controller is monitoring the relay
ON time.
25-86 Reset Relay Counters
Option: Function:
Resets all elements in parameter 25-85 Relay
ON Time counters.
[0]
*
Do not reset
[1] Do reset
3.23.6 25-9* Service
Parameters used in case of service on 1 or more of the
pumps controlled.
25-90 Pump Interlock
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.
25-90 Pump Interlock
Option: Function:
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 is
running it is immediately destaged. If the pump is not
running, it is not allowed to stage on.
25-91 Manual Alternation
Range: Function:
0
*
[ 0 - par.
25-06 ] Readout parameter for the actual variable 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.
Parameter Descriptions Programming Guide
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