Danfoss VACON 100 FLOW Series Application Manual page 258

VACON® 100 FLOW
Application Guide
1 of the pumps always controls the system. When the pump in control sees that it is necessary to have more capacity (operates at
the maximum frequency), it locks to a constant production speed and makes the next pump to start and to control the system.
When the pump that controls the system sees that there is too much capacity (operates at the minimum frequency), it stops. The
pump that operates at a constant production speed starts to control the system. If there are many pumps that operate at a constant
production speed, the started pump starts to control the system. If no pumps operate at a constant production speed when the
pump in control sees the overcapacity, the pump goes to the Sleep mode (if the Sleep function is enabled).
RPM
f
max
f
min
P1 P2
Illustration 92: Control in the Multimaster Mode
A Curves A show the control of the pumps
B The pumps are locked to the constant production frequency
11.17.2.4 (ID 1001) Number of Pumps
Location in the menu: P3.15.2
Use this parameter to set the total number of motors/pumps used in the Multi-pump system. The maximum number of pumps in
the Multi-pump system is 8.
Set this parameter in the installation. If 1 drive is removed to do the servicing of the pump, for example, it is not necessary to change
this parameter.
In the Multifollower and Multimaster modes, all drives must have the same value in this parameter for the correct communication
between the drives.
11.17.2.5 (ID 1500) Pump ID Number
Location in the menu: P3.15.3
Use this parameter to set the ID number of the drive. This parameter is used only in the Multifollower and Multimaster modes.
Each drive in the Multi-pump system must have a unique sequence (ID) number, always start from 1.
Pump number 1 is always the primary master of the Multi-pump system. Drive number 1 controls the process and the PID controller.
The PID feedback and the PID setpoint signals must be connected to the drive number 1.
If the drive number 1 is not available in the system, there is a power-down of the drive, for example, the next drive starts to operate
as a secondary master of the Multi-pump system.
The communication between the drives is not correct, if:
• the Pump ID numbers are not in a numerical order (start from 1), or
• 2 drives have the same ID number.
11.17.2.6 (ID 1782) Start and Feedback Signals
Location in the menu: P3.15.4
Use this parameter to select the signals that are connected to the drive.
0 = The start and the PID feedback signals not connected to the drive in question
1 = Only the start signals connected to the drive in question
2 = The start and the PID feedback signals connected to the drive in question
258 | Danfoss A/S © 2023.08
B
A
P3
t
Parameter Descriptions
AB298035655957en-000201 / DPD01083