Danfoss VLT FC 100 Series Programming Manual page 220

3. Parameter Description
25-59 Run on Mains Delay
Range:
*
0.5 sec [Par. 25-58 – 5.0 sec ]
3
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
Option:
Disabled
Emergency
Off
In Open Loop
Frozen
Jogging
Running
Running FSBW
Staging
Destaging
Alternating
Lead Not Set
25-81 Pump Status
Option:
[X] Disabled
[O] Off
[D] Running on Frequency
Converter
[R] Running on Mains
220
Function:
This parameter is only active if the option selected in
[0].
This parameter sets the time between stopping the old variable speed pump and starting this pump as a new
Staging Mode and Alternation
fixed speed pump. Refer to
and alternation.
Function:
Read out of the status of the Cascade Controller.
par. 25-00, Cascade Controller
Cascade Controller is disabled
All pumps have been stopped by means of a Coast/Coast inverse or an External Interlock command applied to
the frequency converter.
All pumps have been stopped by means of a Stop command applied to the frequency converter.
Par. 1-00, Configuration Mode
, has been set for Open Loop. All fixed speed pumps are stopped. The variable
speed pump will continue to run.
Staging/destaging of pumps has been locked and reference locked.
All fixed speed pumps are stopped. When stopped, the variable speed pump will run at jog speed.
A Start command is applied to the frequency converter and the cascade controller is controlling the pumps.
The frequency converter is tripped off and the Cascade Controller is controlling the fixed speed pumps based
par. 25-22, Fixed Speed Bandwidth
on
The Cascade Controller is staging fixed speed pumps.
The Cascade Controller is destaging fixed speed pumps.
par. 25-50, Lead Pump Alternation
The
place.
No pump available to be assigned as variable speed pump.
Function:
Pump Status shows the status for the number of pumps selected in
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.
The pump is interlocked either via par. 25-19, Pump Interlock
(number on pump) Interlock in par. 5-1*, Digital Inputs
Stopped by the cascade controller (but not interlocked).
Variable speed pump, regardless if connected directly or controlled via relay in the frequency converter.
Running on mains. Fixed speed pump running.
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
®
VLT HVAC Drive Programming Guide
Lead Pump Alternation
, par. 25-56, and Figure 7-5 for description of staging
, .
.
Off
, selection is different than [0] and an alternating sequence is taking
par. 25-01, Number of Pumps
, or signal on a digital input programmed for Pump
, . Can only refer to fixed speed pumps.
Off
, par. 25-50, is different from
, . It is a