Danfoss VLT Series Operating Instructions Manual page 40

1 Extended and Advanced Cascade Controller
Option
Parameter:
Change from RPM to Hz as speed unit
1
Motor rated power
Motor rated voltage
Motor Current
Motor Rated Speed
Motor Rotation Check
Enable Automatic Motor Adaptation
Ramp Up Time
Ramp Down Time
Motor Speed Low Limit [Hz]
Motor Speed High Limit [Hz]
Settings for the Master drive only
Closed Loop
1. Use the
2. Set up the master configuration in par. 27-**
Parameter:
Configuration mode
Set number of drives
Set the staging speed according to table 1.1
Configure Relay 1
Configure Relay 2
Configure Relay 10
Minimum Reference
Maximum Reference
Terminal 27 Mode
Terminal 27 Digital Output
Terminal 27 Pulse Output Variable
Pulse Output Maximum Frequency #27
Settings for the Follower drives only
Set Reference 1 Source
Set Terminal 29 Digital Input
Set Term. 29 Low Frequency
Set Term. 29 high frequency
Autotuned Stage on/off Speeds
If stage on/off autotune is enabled in P27-30, the speed in table 1.1 will be auto optimised during operation and ensure optimised performance.
Operation
When the system is set to operation, the master drive will automatically run
depending on the demand. If, for some reason the user wants to prioritize which motors should be preferred, it is possible to prioritize the pumps in par.
27-16 in three levels. (Priority 1, Priority 2 and spare pump). Pumps with priority 2 will only be staged on when there is no priority 1 pump available.
It might be necessary to fine adjust the
40
No:
0-02
1-20 / 1-21
1-22
1-24
1-25
1-28
1-29
3-41
3-42
4-12
4-14
Quick Menu_Function Setup
Wizard under
stage on/off
speed to optimise the energy consumption, if not auto tuned.
MI.38.C3.02 - VLT
Comment:
(kW / HP)
Check rotation direction
(5 sec.* Depending on size) Must be the same in Master and Follower!
(5 sec.* Depending on size) Must be the same in Master and Follower!
(30 Hz)
(50 Hz) Must be the same in Master and Follower!
, to easily set up the feedback settings and the PID controller.
No: Comment
27-10 Master/Follower
27-11 4
27-3*
27-70 Drive 2 Enable
27-70 Drive 3 Enable
27-70 Drive 4 Enable
3-02 0 [bar]
3-03 10 [bar]
5-01 Output [1]
5-30 Pulse output [55]
5-60 Cascade Reference [116]
5-62 5000 [Hz]
3-15 Pulse input 29 [7]
5-13 Pulse input [32]
5-50 0 [Hz]
5-51 5000 [Hz]
time balance with all drives running with the needed number of pumps
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is a registered Danfoss trademark
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VLT Operating Instructions