25-59 Run on Mains Delay
Range:
Function:
Alternation
and
for
description of staging and
alternation.
6.14.5 25-8* Status
Readout parameters informing about the operating status
of the cascade controller and the compressors controlled.
25-80 Pack Status
Option:
Function:
Read out of the status of the Pack Controller.
Disabled
Pack Controller is disabled
(
parameter 25-00 Cascade Controller
).
Emergency
All compressors have been stopped by means of
a Coast/Coast inverse or an External Interlock
command applied to the frequency converter.
Off
All compressors have been stopped by means of
a Stop command applied to the frequency
converter.
In Open
Loop
parameter 1-00 Configuration Mode
has been set
for
[0] Open Loop
. All fixed speed compressors are
stopped. The variable speed compressor will
continue to run.
Frozen
Staging/destaging of compressors has been
locked and reference locked.
Jogging
All fixed speed compressors are stopped. When
stopped, the variable speed compressor will run
at jog speed.
Running
A Start command is applied to the frequency
converter and the Pack controller is controlling
the compressors.
Running
FSBW
The frequency converter is tripped off and the
Pack Controller is controlling the fixed speed
compressors based on
parameter 4-14 Motor
Speed High Limit [Hz]
.
Staging
The Pack Controller is staging fixed speed
compressors.
Destaging
The Pack Controller is destaging fixed speed
compressors.
Lead Not
Set
No compressor available to be assigned as
variable speed compressor.
25-81 Compressor Status
Option:
Function:
Compressor Status shows the status for the
number of compressors selected in
parameter 25-06 Number Of Pumps
. It is a
readout of the status for each of the
compressors showing a string, which consists of
25-81 Compressor Status
Option:
Function:
compressor number and the current status of
the compressor.
Example: Readout is with the abbreviation like
“1:D 2:O” This means that compressor 1 is
running and speed controlled by the frequency
converter and compressor 2 is stopped.
[X] Disabled
The compressor is interlocked either via
parameter 25-90 Pump Interlock
, or signal on a
digital input programmed for Compressor
(number on compressor) Interlock in parameter
group
5-1* Digital Inputs
. Can only refer to fixed
speed compressors.
[O] Off
Stopped by the cascade controller (but not
interlocked).
[D] Running on
Frequency
Converter
Variable speed compressor, regardless if
connected directly or controlled via relay in the
frequency converter.
[R] Running on
Mains
Running on mains. Fixed speed compressor
running.
25-82 Lead Compressor
Option:
Function:
0 N/A Readout parameter for the actual variable speed
compressor in the system. It is updated to reflect the
current variable speed compressor in the system
when an alternation takes place. If no lead
compressor is selected (Cascade Controller disabled or
all compressors interlocked) the display will show
NONE.
25-83 Relay Status
Array [2]
On
Off 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”.
25-84 Compressor ON Time
Array [2]
0
h
*
[0 –
2147483647
h]
Readout of the value for Compressor ON
Time. The Cascade Controller has sete
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, e.g. if the compressor is replaced
in case of service.
Parameter Descriptions
VLT
®
Compressor Drives CDS 302/CDS 303
120
Danfoss A/S © Rev. 2013-07-03 All rights reserved.
MG34M422
6
6
Summary of Contents for VLT CDS 303
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