Danfoss VLT AQUA Drive FC 200 Programming Manual page 175

Parameter Description
25-84 Pump ON Time
Range:
0 h [0 -
*
2147483647 h]
3 3
25-85 Relay ON Time
Range:
0 h [0 -
*
2147483647 h]
25-86 Reset Relay Counters
Option:
[0] Do not reset
*
[1] Do reset
3.22.6 25-9* Service
Parameters used in case of service on one or more of the
pumps controlled.
25-90 Pump Interlock
Option: Function:
In this parameter, it is possible to disable one or more
of the fixed lead pumps. For example, the pump will
not be 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 Pump 1-3
Interlock [130–132] in parameter group 5-1*, Digital
Inputs.
[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.
174
®
VLT
Function:
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, e.g. if the pump is
replaced in case of service.
Function:
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 done based on the relay counters,
otherwise it would always use the new
pump if a pump is replaced and its value
in 25-84 Pump ON Time is reset. To use
25-04 Pump Cycling, the Cascade Controller
is monitoring the Relay ON time.
Function:
Resets all elements in 25-85 Relay ON Time
counters.
MG20O602 - VLT
AQUA Drive Programming Guide
25-91 Manual Alternation
Range:
0 [ 0 - par.
*
25-06 ]
®
is a registered Danfoss trademark
Function:
Readout parameter for the actual variable
speed pump in the system. The Lead Pump
parameter is updated to reflect the current
variable speed pump in the system when an
alternation takes place. If no lead pump is
selected (Cascade Controller disabled or all
pumps interlocked) the display will show
NONE.