Staging Settings - Danfoss MCO 101 Manual

Extended and Advanced Cascade Controller
Option
27-32 Stage On Speed (Hz)
Range:
par. 4-14* [par. 4-12 – par. 4-14]
27-33 Stage Off Speed (RPM)
Range:
par. 4-11* [par. 4-11 – par. 4-13]
27-34 Stage Off Speed (Hz)
Range:
par. 4-12* [par. 4-12 – par. 4-14]

6.1.7 Staging Settings, 27-4*

Parameters for configuring staging transitions.
6.1.8 Auto-tune Staging Settings, 27-40
27-40 Auto-tune Staging Settings
Option:
[0] Disabled
[1] * Enabled
27-41 Ramp-down Delay
Range:
10 s* [0 s –120 s]
Function:
To be used if Hz is chosen.
If the lead pump is operating above Stage On Speed for the time specified in Staging Delay (par.
27-23), and a variable speed pump is available, it will be turned on.
Function:
If the lead pump is operating below Stage Off Speed for the time specified in De-staging Delay (par.
27-24), and more than one variable speed pump is on, a variable speed pump will be turned off.
Function:
If the lead pump is operating below Stage Off Speed for the time specified in De-staging Delay (par.
27-24), and more than one variable speed pump is on, a variable speed pump will be turned off.
Function:
When enabled, the staging threshold will be auto-tuned during operation. The settings are optimized
in order to prevent overpressure and underpressure when staging and de-staging. If disabled, the
thresholds can be set manually.
Staging or de-staging threshold.
Function:
Ramp-down Delay sets the delay between turning on a soft starter controlled pump and ramping
down the drive-controlled pump. This is only used for soft starter-controlled pumps.
®
MI.38.C2.22 - VLT is a registered Danfoss trademark
6 How to Program
6
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