Configuration Examples; Master/Follower; Basic Settings; Master Drive Settings - Danfoss VLT AQUA Operating Instructions Manual

Configuration Examples

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)
0-02 Motor Speed Unit
1-20 Motor Power [kW]
1-22 Motor Voltage [V]
1-23 Motor Frequency [Hz]
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]
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.
®
VLT AQUA Drive MCO 101/MCO 102
Example/remarks
[1] Hz
50
Settings must be the
same for master and
followers
®
MI38C402 - VLT is a registered Danfoss trademark
Display settings - master drive
0-20 Display Line 1.1 Small
0-21 Display Line 1.2 Small
0-22 Display Line 1.3 Small
0-23 Display Line 2 Large
0-24 Display Line 3 Large
Display settings - follower drives
0-20 Display Line 1.1 Small
0-24 Display Line 3 Large
Table 6.2

6.1.2 Master Drive Settings

27-1* Configuration
27-10 Cascade Controller
27-11 Number Of Drives
27-16 Runtime Balancing
27-18 Spin Time for Unused Pumps
27-19 Reset Current Runtime Hours
Table 6.3 Master Drive Settings, 27-1* Configuration
27-2* Bandwidth Settings
27-21 Override Limit
27-23 Staging Delay
27-24 Destaging Delay
Table 6.4 Master Drive Settings, 27-2* Bandwidth Settings
27-3* Staging Speeds
27-30 Auto Tune Staging Speeds
27-31 Stage On Speed [RPM]
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
27-52 Alternation Time Interval
27-54 Alternation At Time of Day
27-56 Alternate Capacity is <
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.
Example
[1601] Reference
[1652] Feedback
[1614] Motor current
[1613] Frequency
[2794] Cascade System
Status
Example
[1650] External Reference
[1613] Frequency
Example
[1] Master/Follower
3
[0] Array, Balanced
Priority 1
0 (s) , Off
[1] Do reset
Example
100 (%)
15 (s)
15 (s)
Example/Remarks
Enabled [1]
Arrays for the staging
speeds, see example in
Table 6.10
Example
0 (min), Disabled
[0] Disabled
0 (s), Off
41
6 6