Operating Instructions
Table Of Contents
- 1. Siemens BT300 - Startup
- 2. Keypad of the drive
- 3. Siemens Application
- 3.1 Specific functions of the Siemens application
- 3.2 Example of control connections
- 3.3 Application - Quick setup parameter group
- 3.4 Monitor group
- 3.5 Application parameter lists
- 3.5.1 Parameter programming
- 3.5.2 Column explanations
- 3.5.3 Group 3.1: Motor settings
- 3.5.4 Group 3.2: Start/Stop setup
- 3.5.5 Group 3.3: Control reference settings
- 3.5.6 Group 3.4: Ramp & Brakes Setup
- 3.5.7 Group 3.5: I/O Configuration
- 3.5.8 Group 3.6: Fieldbus Data Mapping
- 3.5.9 Group 3.7: Prohibited Frequencies
- 3.5.10 Group 3.8: Limit supervisions
- 3.5.11 Group 3.9: Protections
- 3.5.12 Group 3.10: Automatic reset
- 3.5.13 Group 3.11: Timer functions
- 3.5.14 Group 3.12: PID-controller 1
- 3.5.15 Group 3.13: PID-controller 2
- 3.5.16 Group 3.14: Multi-pump
- 3.5.17 Group 3.16: Fire mode
- 3.5.18 Group 3.17: Application settings
- 3.6 HVAC Application - Additional parameter information
- 3.7 Application - Fault tracing
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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.
Table 52: Multi-pump parameters
Code Parameter Min Max Unit Default ID Description
P3.14.1 Number of motors 1 4 1 1001
Total number of motors
(pumps/fans) used in multi-
pump system
P3.14.2 Interlock function 0 1 1 1032
Enable/Disable use of inter-
locks. Interlocks are used to
tell the system if a motor is
connected or not.
0 = Disabled
1 = Enabled
P3.14.3 Include FC 0 1 1 1028
Include the variable fre-
quency drive in the auto-
change and interlocking sys-
tem.
0 = Disabled
1 = Enabled
P3.14.4 Auto-change 0 1 0 1027
Disable/enable rotation of
starting order and priority of
motors.
0 = Disabled
1 = Enabled
P3.14.5 Auto-change interval 0.0 3000.0 h 48.0 1029
After the expiry of the time
defined with this parameter,
the auto-change function
takes place if the capacity
used lies below the level
defined with parameters
P3.14.6 and P3.14.7.
P3.14.6
Auto-change: Fre-
quency limit
0.00 50.00 Hz 25.00 1031
These parameters define the
level below which the capac-
ity used must remain so that
the auto-change can take
place.
P3.14.7
Auto-change: Motor
limit
0 4 1 1030
P3.14.8 Bandwidth 0 100 % 10 1097
Percentage of the setpoint.
E.g.: Setpoint = 5 bar, Band-
width = 10%: As long as the
feedback value stays within
4.5...5.5 bar motor discon-
nection or removal will not
take place.
P3.14.9 Bandwidth delay 0 3600 s 10 1098
With feedback outside the
bandwidth, this time must
pass before pumps are
added or removed.