Group 3.14: Multi-Pump - Siemens BT300 Applications Manual

Siemens Application
3.5.16

Group 3.14: Multi-pump

The Multi-pump functionality allows you to control up to 4 motors (pumps, fans) with PID controller 1.
The drive is connected to one motor which is the "regulating" motor connecting and disconnecting the
other motors to/from the mains by means of contactors controlled with relays when needed in order to
maintain the right setpoint. The Autochange function controls the order/priority in which the motors are
started in order to guarantee their equal wear. The controlling motor can be included in the autochange
and interlocks logic, or it may be selected to always functions as Motor 1. Motors can be taken out of use
momentarily, e.g. for service, using the motor Interlock function. See page 90.
Code Parameter
P3.14.1 Number of motors
P3.14.2 Interlock function
P3.14.3 Include FC
P3.14.4 Auto-change
P3.14.5 Auto-change interval
Auto-change: Fre-
P3.14.6
quency limit
Auto-change: Motor
P3.14.7
limit
P3.14.8 Bandwidth
P3.14.9 Bandwidth delay
24-hour support +1-800-877-7545 (Dial 2)
Table 52: Multi-pump parameters
Min Max Unit
1 4
0 1
0 1
0 1
0.0 3000.0 h
0.00 50.00 Hz
0 4
0 100 %
0 3600 s
Siemens Industry, Inc. • 69
Default ID
Total number of motors
1 1001 (pumps/fans) used in multi-
pump system
Enable/Disable use of inter-
locks. Interlocks are used to
tell the system if a motor is
1 1032
connected or not.
0 = Disabled
1 = Enabled
Include the variable fre-
quency drive in the auto-
change and interlocking sys-
1 1028
tem.
0 = Disabled
1 = Enabled
Disable/enable rotation of
starting order and priority of
0 1027 motors.
0 = Disabled
1 = Enabled
After the expiry of the time
defined with this parameter,
the auto-change function
48.0 1029 takes place if the capacity
used lies below the level
defined with parameters
P3.14.6 and P3.14.7.
These parameters define the
25.00 1031
level below which the capac-
ity used must remain so that
the auto-change can take
1 1030
place.
Percentage of the setpoint.
E.g.: Setpoint = 5 bar, Band-
width = 10%: As long as the
10 1097 feedback value stays within
4.5...5.5 bar motor discon-
nection or removal will not
take place.
With feedback outside the
bandwidth, this time must
10 1098
pass before pumps are
added or removed.
Description
3