Danfoss VLT AQUA Drive FC 202 Programming Manual page 184

Parameter Description
25-81 Pump Status
Range: Function:
0 [0 - Pump Status shows the status for the number of
*
25 ] pumps selected in parameter 25-06 Number of Pumps.
It is a readout of the status for each of the pumps
3 3
showing a string, which consists of pump number
and the current status of the pump.
Example: Readout is with the abbreviation like "1:D
2:O" This means that pump 1 is running and speed
controlled by the frequency converter and pump 2 is
stopped.
25-82 Lead Pump
Range:
0 [ 0 - par.
*
25-06 ]
25-83 Relay Status
Range:
0 [0 - 4 ] Read out of the status for each of the relays
*
25-84 Pump ON Time
Range:
0 h [0 -
*
2147483647 h]
25-85 Relay ON Time
Range:
0 [0 -
h 2147483647
*
h]
182
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.
Function:
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".
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
parameter 25-84 Pump ON Time is reset. To
use parameter 25-04 Pump Cycling, the
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
Programming Guide
25-85 Relay ON Time
Range:
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:
[0] Off The pump is active for staging/destaging.
[1] On
25-91 Manual Alternation
Range:
0 [ 0 - par.
*
25-06 ]
Function:
cascade controller is monitoring the Relay
ON time.
Function:
Resets all elements in parameter 25-85 Relay ON
Time counters.
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.
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.
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.
MG20O702