3.23.5 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
*
[0 - 0 ] Read out of the status of the Cascade Controller.
25-81 Pump Status
Range:
Function:
0
*
[0 -
0 ]
Pump Status shows the status for the number of
pumps selected in
. 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 frequency converter and pump 2
is stopped.
25-82 Lead Pump
Range:
Function:
0
*
[ 0 - par.
25-06 ]
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
*
[0 - 0 ] Read out 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.
25-85 Relay ON Time
Array [2]
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 done based on the relay counters,
otherwise it would always use the new
pump if a pump is replaced and its value
in
is reset. In order
to use
the Cascade
Controller is monitoring the Relay ON
time.
25-86 Reset Relay Counters
Option:
Function:
Resets all elements in
counters.
[0]
*
Do not reset
[1]
Do reset
3.23.6 25-9* Service
Parameters used in case of service on one or more of the
pumps controlled.
25-90 Pump Interlock
Array [2]
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.
25-91 Manual Alternation
Range:
Function:
0
*
[ 0 - par.
25-06 ]
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.
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
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