Alternation Settings - Danfoss MCO 101 Manual

6 How to Program
27-48 De-staging Speed (Hz)
Option:
Units: rpm

6.1.9 Alternation Settings, 27-5*

Parameters for configuring alternations.
27-51 Alternation Event
Option:
[0] * Off
[1] At De-stage
27-52 Alternation Time Interval
6
Range:
0 (Disa- [0 (Disabled) – 32808 ft [10000 m]] Alternation Time Interval is the user settable time between alternations. It is disabled by setting it
bled)*
27-53 Alternation Timer Value
Option:
Units: min
27-54 Alternate at Time of Day
Option:
[0] * Disabled
[1] Time of Day
27-55 Alternation Predefined Time
Range:
1:00* [00:00 – 23:59]
27-56 Alternate Capacity is <
Range:
0% (Off)* [0% (Off) – 100%]
6-10
Function:
De-staging Speed is a readout parameter that shows the actual de-staging speed based on the de-
staging threshold.
Function:
Alternation Event allows alternation at destage.
Function:
to 0. Parameter 27-53 shows the time remaining until the next alternation occurs.
Function:
Alternation Timer Value is a readout parameter that shows the time remaining before an-interval
based alternation takes place. Parameter 27-52 sets the time interval
Function:
Alternate at Time of Day allows the user to select a specific time of day for alternating pumps. The
time is set in parameter 27-55. Alternation at Time of Day requires the real time clock to be set.
Function:
Alternation Predefined Time is the time of day for pump alternation. This parameter is only available
if parameter 27-54 is set to Time of Day.
Function:
Alternate Capacity is < requires the lead pump to be operating below this capacity before time based
alternation will be allowed to take place. This feature ensures that alternation only takes place when
the pump is running below a speed where interruption in operation will not affect the process. This
minimizes the system disturbance caused by alternations. The value is entered as a % of the ca-
pacity of pump 1. Alternate Capacity is < operation may be disabled by setting this parameter to
0%.
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Extended and Advanced Cascade Controller
Option