External Setpoint Signal; Bus Signal; Other Bus Standards - Grundfos TPE 2000-Serie Installationsanleitung

13. External setpoint signal

The setpoint can be remote-set by connecting an analogue signal
transmitter to the input for the setpoint signal (terminal 4).
Setpoint
External setpoint
Fig. 37 Actual setpoint as a product (multiplied value) of
setpoint and external setpoint
Select the actual external signal, 0-10 V, 0-20 mA, 4-20 mA, via
the R100, see section 9.3.2 External setpoint.
Control mode controlled
If control mode controlled, see control hierarchy in section 6.1, is
selected by means of the R100, the pump can be controlled to:
• proportional pressure
• constant pressure.
In control mode proportional pressure, the setpoint can be set
externally within the range from 25 % of maximum head to the
setpoint set on the pump or by means of the R100, see fig. 38.
Actual setpoint
[m]
90 % of maximum pump head
Setpoint set by means of
control panel, R100 or
PC Tool E-products
Actual
setpoint
25 % of maximum pump head
0 10 V
0 20 mA
4 20 mA
Fig. 38 Relation between the actual setpoint and the external
setpoint signal in control mode proportional pressure
Example: At a maximum head of 12 metres, a setpoint of
6 metres and an external setpoint of 40 %, the actual setpoint will
be as follows:
H = (H - 1/4 H ) x %
actual set max.
= (6 - 12/4) x 40 % + 12/4
= 4.2 metres
In control mode constant pressure, the setpoint can be set
externally within the range from 12.5 % of maximum head to the
setpoint set on the pump or by means of the R100, see fig. 39.
Actual setpoint
[m]
Maximum pump head
Setpoint set by means of
control panel, R100 or
PC Tool E-products
Actual
setpoint
12.5 % of maximum pump head
0 10 V
0 20 mA
4 20 mA
Fig. 39 Relation between the actual setpoint and the external
setpoint signal in control mode constant pressure
Actual setpoint
External setpoint signal
+ 1/4 H
external setpoint max.
External setpoint signal
Example: At a maximum head of 12 metres, a setpoint of
6 metres and an external setpoint of 80 %, the actual setpoint will
be as follows:
H = (H - 1/8 H ) x %
actual set max.
= (6 - 12/8) x 80 % + 12/8
= 5.1 metres
Control mode uncontrolled
If control mode uncontrolled, see control hierarchy in section 6.1,
is selected by means of the R100, the pump is controlled to a
constant curve and can be controlled by any (external) controller.
In control mode constant curve, the setpoint can be set
externally within the range from the min. curve to the setpoint set
on the pump or by means of the R100, see fig. 40.
Actual setpoint
[%]
Max. curve
Setpoint set by means of
control panel, R100 or
PC Tool E-products
Actual
setpoint
Min. curve
0 10 V
0 20 mA
4 20 mA
Fig. 40 Relation between the actual setpoint and the external
setpoint signal in control mode constant curve

14. Bus signal

The pump supports serial communication via an RS-485 input.
The communication is carried out according to the Grundfos bus
protocol, GENIbus protocol, and enables connection to a building
management system or another external control system.
Operating parameters, such as setpoint, operating mode, etc. can
be remote-set via the bus signal. At the same time, the pump can
provide status information about important parameters, such as
actual value of control parameter, input power, fault indications,
etc.
Contact Grundfos for further details.
If a bus signal is used, the number of settings
Note
available via the R100 will be reduced.

15. Other bus standards

Grundfos offers various bus solutions with communication
according to other standards.
Contact Grundfos for further details.
+ 1/8 H
external setpoint max.
External setpoint signal
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