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25-59 Run-on Line Delay
Range:
Function:
0.5 s*
[par. 25-58 - 5.0 s]
This parameter is only active if the option selected in par.25-50
is different
from
Off
[0].
This parameter sets the time between stopping the old variable speed pump and starting this pump
as a new fixed speed pump. Refer to par.25-56
the illustration for
description of staging and alternation.
3.23.6 25-8* Status
Readout parameters informing about the operating status of the cascade controller and the pumps controlled.
25-80 Cascade Status
Range:
Function:
0 N/A*
[0 - 0 N/A]
Readout of the status of the cascade controller.
25-81 Pump Status
Range:
Function:
0 N/A*
[0 - 0 N/A]
Pump Status shows the status for the number of pumps selected in par.25-06
.
It is a readout of the status for each of the pumps 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 adjustable frequency drive and pump 2 is stopped.
25-82 Lead Pump
Range:
Function:
0 N/A*
[0 - par. 25-06 N/A]
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.
25-83 Relay Status
Array [2]
Range:
Function:
0 N/A*
[0 - 0 N/A]
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
Array [2]
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,
e.g., if the pump is replaced in case of service.
3 Parameter Description
VLT
®
HVAC Drive Programming Guide
3-248
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3