Grundfos SPKE Series, Инструкция по установке и эксплуатации

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27
English (US)
14. External setpoint signal
The setpoint can be remote-set by connecting an analogue signal
transmitter to the input for the setpoint signal (terminal 4).
Fig. 38
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
10.3.3 External setpoint
on page 19.
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 the lower value of the sensor measuring
range to the setpoint set on the pump or by means of the R100.
Fig. 39
Relation between the actual setpoint and the external
setpoint signal in control mode controlled
Example:
At a sensor
min
value of 0 psi, a setpoint set of
50 psi and an external setpoint of 80 % (an 8V analog
signal to Terminal 4 if using an analog signal of 0 - 10V),
the actual setpoint will be as follows:
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. Typically the setpoint is set to
100 % when the control mode is uncontrolled (see section
10.5 Typical display settings for analog input E-pumps
on page
25).
Fig. 40
Relation between the actual setpoint and the external
setpoint signal in control mode uncontrolled
15. 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.
16. Other bus standards
Grundfos offers various bus solutions with communication
according to other standards.
Contact Grundfos for further details.
External fault
Flow switch
Dry running
T
M
03
86
01
20
07
T
M
02
89
88
13
04
Digital function
(terminals 1 and 9) (terminals 9 and 10) (terminals 9 and 11)
Normal duty
Q
H
Q
H
5 s
delay
Q
H
5 s
5 s
delay
Q
H
Setpoint
External setpoint
Actual setpoint
0 10 V
0 20 mA
4 20 mA
Actual setpoint
Sensor
max
Setpoint set by means of
control panel, R100 or PC Tool
E-products
Sensor
min
External setpoint signal
Actual
setpoint
Actual setpoint =
(setpoint - sensor
min
) x %
external setpoint
+
sensor
min
= (50 - 0) x 80 % + 0
= 40 psi
T
M
02
89
88
13
04
1RWH
1RWH
If a bus signal is used, the number of settings
available via the R100 will be reduced.
0 10 V
0 20 mA
4 20 mA
Actual setpoint
Max
curve
Setpoint set by means of
control panel, R100 or PC Tool
E-products
Min
curve
External setpoint signal
Actual
setpoint
DBP-1 - GRUNDFOS PUMP CRE - 99392005