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7 How to Program the Adjustable Frequency
Drive
7.3.23 25-** Cascade Controller
Par.
Parameter description
No. #
25-0* System Settings
25-00
Cascade Controller
25-02
Motor Start
25-04
Pump Cycling
25-05
Fixed Lead Pump
25-06
Number Of Pumps
25-2* Bandwidth Settings
25-20
Staging Bandwidth
25-21
Override Bandwidth
25-22
Fixed Speed Bandwidth
25-23
SBW Staging Delay
25-24
SBW De-staging Delay
25-25
OBW Time
25-26
Destage At No-Flow
25-27
Stage Function
25-28
Stage Function Time
25-29
Destage Function
25-30
Destage Function Time
25-4* Staging Settings
25-40
Ramp-down Delay
25-41
Ramp-up Delay
25-42
Staging Threshold
7
25-43
De-staging Threshold
25-44
Staging Speed [RPM]
25-45
Staging Speed [Hz]
25-46
De-staging Speed [RPM]
25-47
De-staging Speed [Hz]
25-5* Alternation Settings
25-50
Lead Pump Alternation
25-51
Alternation Event
25-52
Alternation Time Interval
25-53
Alternation Timer Value
25-54
Alternation Predefined Time
25-55
Alternate if Load < 50%
25-56
Staging Mode at Alternation
25-58
Run Next Pump Delay
25-59
Run-on Line Delay
25-8* Status
25-80
Cascade Status
25-81
Pump Status
25-82
Lead Pump
25-83
Relay Status
25-84
Pump ON Time
25-85
Relay ON Time
25-86
Reset Relay Counters
25-9* Service
25-90
Pump Interlock
25-91
Manual Alternation
7-70
Default value
[0] Disabled
[0] Direct on Line
[0] Disabled
[1] Yes
2 N/A
10 %
100 %
casco_staging_bandwidth
(P2520)
15 s
15 s
10 s
[0] Disabled
[1] Enabled
15 s
[1] Enabled
15 s
10.0 s
2.0 s
ExpressionLimit
ExpressionLimit
0 RPM
0.0 Hz
0 RPM
0.0 Hz
[0] OFF
[0] External
24 h
0 N/A
ExpressionLimit
[1] Enabled
[0] Slow
0.1 s
0.5 s
0 N/A
0 N/A
0 N/A
0 N/A
0 h
0 h
[0] Do not reset
[0] Off
0 N/A
MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
VLT
®
HVAC Drive Instruction Manual
4-set-up
Change dur-
Conver-
ing operation
sion index
2 set-ups
FALSE
-
2 set-ups
FALSE
-
All set-ups
TRUE
-
2 set-ups
FALSE
-
2 set-ups
FALSE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
-
All set-ups
TRUE
-
All set-ups
TRUE
0
All set-ups
TRUE
-
All set-ups
TRUE
0
All set-ups
TRUE
-1
All set-ups
TRUE
-1
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
67
All set-ups
TRUE
-1
All set-ups
TRUE
67
All set-ups
TRUE
-1
All set-ups
TRUE
-
All set-ups
TRUE
-
All set-ups
TRUE
74
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
-
All set-ups
TRUE
-
All set-ups
TRUE
-1
All set-ups
TRUE
-1
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
0
All set-ups
TRUE
74
All set-ups
TRUE
74
All set-ups
TRUE
-
All set-ups
TRUE
-
All set-ups
TRUE
0
Type
Uint8
Uint8
Uint8
Uint8
Uint8
Uint8
Uint8
Uint8
Uint16
Uint16
Uint16
Uint8
Uint8
Uint16
Uint8
Uint16
Uint16
Uint16
Uint8
Uint8
Uint16
Uint16
Uint16
Uint16
Uint8
Uint8
Uint16
VisStr[7
]
TimeOf-
DayWo-
Date
Uint8
Uint8
Uint16
Uint16
VisStr[2
5]
VisStr[2
5]
Uint8
VisStr[4
]
Uint32
Uint32
Uint8
Uint8
Uint8
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