8-0* General Settings
21-3* Ext. CL 2 Ref./Fb.
201-3* Constant Pressure Stop Function
8-1* Control Settings
21-4* Ext. CL 2 PID
201-5* Stop Adjustments Ext.
8-3* FC Port Settings
22-** Appl. Functions
202 - Sensors
8-4* FC MC protocol set
22-0* Miscellaneous
202-0* Analog Input Sensor Setup
8-5* Digital/Bus
22-2* No-Flow Detection
202-1* Temperature Input Sensor Setup
8-8* FC Port Diagnostics
22-3* No-Flow Power Tuning
203 - Status Monitor
8-9* Bus Jog / Feedback
22-4* Sleep Mode
203-0* Grundfos Readouts
13-** Smart Logic
22-5* End of Curve
203-1* GENIbus
13-1* Comparators
23-** Timer-based Functions
203-3* Alarm/Warning Log
13-1* RS Flip Flops
23-0* Timed Actions
203-4* Accumulated Flow
13-4* Logic Rules
23-1* Maintenance
203-5* GENIbus Readout Parameters
23-1* Maintenance Reset
203-7* GENIbus Setpoint Readout
23-5* Energy Log
203-8* Misc. Functions
23-6* Trending
23-8* Payback Counter
Related information
8.4 Operating modes
The following operating modes are set on the operating panel using
the [Favourites] menu.
Operating mode
Description
Normal
The pump is running in the
operating mode selected.
Stop
The pump has been stopped,
and the green indicator light is
flashing.
Min.
The pump is running at
minimum speed.
Max.
The pump is running at
maximum speed.
User curve
The pump is running at a user-
defined speed.
1
2
Minimum and maximum
curves
The pump speed is kept at a
given set value for minimum and
maximum speed.
Pos. 1: Minimum
Pos. 2: Maximum
Examples:
•
Maximum curve operation can, for instance, be used in
connection with venting the pump during installation.
•
Minimum curve operation can, for instance, be used in periods
with a very small flow rate requirement.
8.5 Control modes
The control mode is set in the [Favourites] menu.
There are two basic control modes:
•
Uncontrolled operation (open loop).
•
Controlled operation (closed loop) with a sensor connected.
Related information
8.5.1 Uncontrolled operation (open loop)
8.5.2 Controlled operation (closed loop)
8.5.1 Uncontrolled operation (open loop)
Constant curve
The speed is kept at a set value
in the range between the
minimum and maximum curves.
The setpoint is set in %
corresponding to the required
speed.
Examples:
•
Operation on constant curve can, for instance, be used for
pumps with no sensor connected.
•
Typically used in connection with an overall control system, such
as MPC or another external controller.
Related information
8.5.2 Controlled operation (closed loop)
CUE
Δp
Proportional
differential
pressure
The differential
pressure is reduced
at falling flow rate
and increased at
rising flow rate.
CUE
Δp
Constant
differential
pressure, pump
The differential
pressure is kept
constant,
independently of the
flow rate.
CUE
Δp
Constant
differential
pressure, system
The differential
pressure is kept
constant,
independently of the
flow rate.
25
English (GB)
