6 Configuration Examples
6.1 Master/Follower
The following example describes configuration of 3
variable speed pumps, see
Illustration 2.4
. It is assumed
that the pressure transmitter used as feedback sensor and
has a range from 0-10 bar. An internal reference is used.
For more detailed information on the master-follower
application and on the staging/de-staging principle, see
2 Application Types
and
4 Configuring the System
.
The necessary steps for the configuration are:
•
Basic Settings for the master and for the follower
(Motor data, Display etc.)
•
Configuration of the master
•
Configuration of one of the followers
•
Copying the settings with the LCP from this
follower to the other followers
6.1.1 Basic Settings
Basic settings (master and follower)
Example/remarks
0-02 Motor Speed Unit
[1] Hz
1-20 Motor Power [kW]
1-22 Motor Voltage [V]
1-23 Motor Frequency [Hz]
50
1-24 Motor Current [A]
1-25 Motor Nominal Speed [RPM]
1-29 Automatic Motor Adaptation
(AMA)
3-41 Ramp 1 Ramp up Time [s]
Settings must be the
same for master and
followers
3-42 Ramp 1 Ramp down Time [s]
4-11 Motor Speed Low Limit [RPM]
4-12 Motor Speed Low Limit [Hz]
4-13 Motor Speed High Limit [RPM]
4-14 Motor Speed Low Limit [Hz]
Table 6.1 Basic Settings
NOTICE
Ensure that the motor is properly running before setting
the master drive to closed loop operation.
Display settings - master drive
Example
0-20 Display Line 1.1 Small
[1601] Reference
0-21 Display Line 1.2 Small
[1652] Feedback
0-22 Display Line 1.3 Small
[1614] Motor current
0-23 Display Line 2 Large
[1613] Frequency
0-24 Display Line 3 Large
[2794] Cascade System
Status
Display settings - follower drives
Example
0-20 Display Line 1.1 Small
[1650] External Reference
0-24 Display Line 3 Large
[1613] Frequency
Table 6.2
6.1.2 Master Drive Settings
27-1* Configuration
Example
27-10 Cascade Controller
[1] Master/Follower
27-11 Number Of Drives
3
27-16 Runtime Balancing
[0] Array, Balanced
Priority 1
27-18 Spin Time for Unused Pumps
0 (s) , Off
27-19 Reset Current Runtime Hours
[1] Do reset
Table 6.3 Master Drive Settings, 27-1* Configuration
27-2* Bandwidth Settings
Example
27-21 Override Limit
100 (%)
27-23 Staging Delay
15 (s)
27-24 Destaging Delay
15 (s)
Table 6.4 Master Drive Settings, 27-2* Bandwidth Settings
27-3* Staging Speeds
Example/Remarks
27-30 Auto Tune Staging Speeds
Enabled [1]
27-31 Stage On Speed [RPM]
Arrays for the staging
speeds, see example in
Table 6.10
27-32 Stage On Speed [Hz]
27-33 Stage Off Speed [RPM]
27-34 Stage Off Speed [Hz]
Table 6.5 Master Drive Settings, 27-3* Staging Speeds
27-5* Alternate Settings
Example
27-52 Alternation Time Interval
0 (min), Disabled
27-54 Alternation At Time of Day
[0] Disabled
27-56 Alternate Capacity is <
0 (s), Off
Table 6.6 Master Drive Settings, 27-5* Alternate Settings
An array parameter is used to configure the output of the
master drive for the start signal of the follower drives.
Configuration Examples
VLT
®
AQUA Drive MCO 101/MCO 102
MI38C402 - VLT
®
is a registered Danfoss trademark
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