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25-83 Relay Status
Array [2]
Range:
Function:
0 N/A*
[0 - 0 N/A]
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 par.25-84
is reset. In order to use par.25-04
the Cascade Controller is monitoring the
Relay ON time.
25-86 Reset Relay Counters
Option:
Function:
Resets all elements in par.25-85
counters.
[0] *
Do not reset
[1]
Do reset
2.21.7 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
par. 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.
2 Parameter Description
VLT
®
AQUA Drive Programming Guide
224
MG.20.O4.02 - VLT
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is a registered Danfoss trademark
2