External Forced-Control Signals; Start/Stop Input; Digital Input; Bus Communication - Grundfos E Serie Instrucciones De Instalación Y Funcionamiento

Priority of settings with bus communication
Control panel
Priority
or R100
1 Stop
2 Max.
3
4
5
6
Example: If the E-pump is operating according to a setpoint set
via bus communication, the control panel or R100 can set the E-
pump to operating mode Stop or Max., and the external signal
can only set the E-pump to operating mode Stop.

11. External forced-control signals

The pump has inputs for external signals for these forced-control
functions:
• Start/stop of pump
• Digital function.

11.1 Start/stop input

Functional diagram: Start/stop input
Start/stop (terminals 2 and 3)
H
H

11.2 Digital input

By means of the R100, one of the following functions can be
selected for the digital input:
• Normal duty
• Min. curve
• Max. curve.
Functional diagram: Input for digital function
Digital function
(terminals 1 and 9)
H
H
H
24
External Bus
signals communication
Stop Stop
Max.
Min.
Setpoint setting
Normal duty
Q
Stop
Q
Normal duty
Q
Min. curve
Q
Max. curve
Q

12. 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. 34 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 8.3.3 External
If control mode uncontrolled is selected by means of the R100,
the pump can be controlled by any controller.
In control mode controlled, the setpoint can be set externally
within the range from sensor
min
by means of the R100.
Actual setpoint
Sensor
Setpoint set by means of
control panel, R100 or
PC Tool E-products
Actual
setpoint
Sensor
0 10 V
0 20 mA
4 20 mA
Fig. 35 Relation between the actual setpoint and the external
setpoint signal in control mode controlled
Example: At a sensor value of 0 m, a setpoint set of 20 m and
min
an external setpoint of 80 %, the actual setpoint will be as follows:
H = (H - H ) x %
actual set min external setpoint
= (20 - 0) x 80 % + 0
= 16 m
In control mode uncontrolled, 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.
Actual setpoint
Maximum curve
Setpoint set by means of
control panel, R100 or PC Tool
E-products
Actual
setpoint
Minimum curve
0 10 V
0 20 mA
4 20 mA
Fig. 36 Relation between the actual setpoint and the external
setpoint signal in control mode open loop
Actual setpoint
setpoint.
to the setpoint set on the pump or
max
min
External setpoint signal
+ H
min
External setpoint signal