Grundfos CIM 150 PROFIBUS DP, Functional Profile And User Manual

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English (GB)
12
7.2.3 Explanation to control mode
Control enumeration for selection of the remote control mode.
H: Pressure (head)
Q: Flow
Important:
When using CIM 150 and 500 or CIU 150 and 500 with Hydro/
Control MPC, the following limitations in the setup of the primary
sensor, feedback sensor, apply:
• Only sensor 1 (AI1) can be used as primary sensor.
• The primary sensor must have a minimum value of 0 for the
Setpoint and FeedBack scaling to be correct.
Control modes Description Illustration
> ConstSpeed (0)
> ConstFreq (1)
The setpoint of the booster system is a percentage of the
maximum performance.
No sensor is required, and in these modes the booster
system is operating in open-loop control.
Note:
Not supported by Hydro Multi-E.
TM
0
4
2
289
2
208
> ConstHead (3)
> ConstPressure (4)
> ConstDiffPressure (5)
The setpoint of the booster system is interpreted as the
setpoint for the pressure.
In these modes, the booster system operates in closed-loop
control and adapts its speed so that the pressure is
constant, regardless of the flow.
A pressure sensor is required.
T
M
04
22
90
22
08
> ConstFlow (7)
> ConstTemp (8)
> ConstLev (10)
The setpoint of the booster system is interpreted as the
setpoint for the flow, temperature or level. ConstFlow is
indicated in the figure.
In these modes, the booster system operates in closed-loop
control, and a relevant sensor is required:
• a temperature sensor for temperature control
• a level sensor for level control
• a flow sensor for flow control.
TM
04
22
88
22
08
> VarDiffPress (6)
The setpoint of the booster system is interpreted as a
proportional-pressure setpoint as shown in the figure.
This is a closed-loop control mode, and a pressure sensor is
required.
TM
0
4
2
291
2
208
H
Q
H
Q
H
Q
H
Q
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