Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 180

Parameter Description
graph) is decelerated to motor speed low limit and then
allowed to vary speed to maintain system pressure.
Motor speed
high limit
3 3
Destaging
speed
Motor speed
low limit
Staging
command
Motor speed
high limit
Staging
speed
Motor speed
low limit
Motor speed
high limit
Destaging
speed
Motor speed
low limit
Illustration 3.67 Staging Mode at Alternation
25-58 Run Next Pump Delay
Range:
0.1 s [0.1 -
*
5 s]
25-59 Run on Mains Delay
Range:
0.5 s [ par.
*
25-58 - 5
s]
3.20.7 25-8* Status
Readout parameters informing about the operating status
of the pack controller and the compressors controlled.
25-80 Pack Status
Readout of the status of the pack controller.
Range:
0
*
178
VLT
Fixed speed
Variable speed
pump
pump
Delay before
Delay
running
before starting
on mains
next pump
Variable speed
pump
Fixed speed
pump
Function:
This parameter is only active if the option
selected in parameter 25-50 Lead Pump
Alternation is different from [0] Off.
This parameter sets the time between stopping
the old variable speed pump and starting
another pump as a new variable speed pump.
Refer to parameter 25-56 Staging Mode at
Alternation for description of staging and
alternation.
Function:
This parameter is only active if the option
selected in parameter 25-50 Lead Pump
Alternation, is different from [0] Off.
This parameter sets the time between
stopping the old variable speed pump and
starting this pump as a new fixed speed
pump. Refer to Illustration 3.67 for description
of staging and alternation.
Function:
[0 - 25]
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®
Refrigeration Drive FC 103
25-81 Compressor Status
Range:
0 [0 -
*
25]
Seconds
25-82 Lead Compressor
Seconds
Range:
0 [ 0 - par.
*
25-06]
Seconds
25-83 Relay Status
Array [2]
Option: Function:
Read out of the status for each of the relays assigned
to control the compressors. 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.
On
Off
25-84 Compressor ON Time
Array [2]
Range:
0 h [0 –
*
2147483647 h]
Function:
This parameter shows the status for the number of
compressors selected in parameter 25-06 Number of
Compressors. It is a readout of the status for each of
the compressors showing a string, which consists of
compressor number and the current status of the
compressor.
Example: Readout is 1:D 2:O. This means that
compressor 1 is running, and the speed is controlled
by the frequency converter, and compressor 2 is
stopped.
Function:
Readout parameter for the actual variable speed
compressor in the system. The lead compressor
parameter is updated to reflect the current
variable speed compressor in the system when
an alternation takes place. If no lead compressor
is selected (pack controller disabled or all pumps
interlocked), the display shows NONE.
Function:
Readout of the value for compressor ON
time. The pack controller has separate
counters for the compressors and for the
relays that control the compressors.
Compressor ON time monitors the
operating hours of each compressor. The
value of each compressor ON time
counter can be reset to 0 by writing in
the parameter, for example, if the
compressor is replaced in case of service.
MG16H202