Staging Speed - Danfoss VLT Series Operating Instructions Manual

1 Extended and Advanced Cascade Controller
Option
1

1.8.5 Staging Speed, 27-3*

Parameters for configuring Master/Follower control response.
27-30 Auto Tune Staging Speeds
Option:
[0] Disabled
[1] * Enabled
27-31 Stage On Speed (RPM)
Range:
P4-13* [par. 4-11 – par. 4-13]
27-32 Stage On Speed (Hz)
Range:
par. 4-14* [par. 4-12 – par. 4-14]
30
Function:
When enabled the stage on and off speeds will continually be auto tuned during operation. The
settings will be optimized in order to ensure a high performance and low energy consumption.
When par. 27-30 is Enabled [1], par. 27-31, par. 27-32, par. 27-33, and par. 27-34 will be kept up
to date with new automatically calculated values. If par. 27-31, par. 27-32, par. 27-33, and par.
27-34 are modified from the bus or LCP, then the new values will be used but will continue to be
automatically tuned.
Values will be recalculated and the parameters updated when staging occurs.
Function:
To be used if RPM 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:
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.
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MI.38.C3.02 - VLT is a registered Danfoss trademark
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VLT Operating Instructions