en
Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.01/2022-06
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Control modes
> PID control
> Constant pressure p-c
Table 12: Control modes
The control mode p-c requires a relative pressure sensor to be connected on the pumps dis-
charge side on analog input AI 1 of the pump. The control modes ∆p-c and ∆p-v also require
the connection of a differential pressure sensor at analogue input AI 1.
NOTICE
With Helix 2.0-VE and Medana CH3-LE pumps the control mode n-c is
already pre-configured in the factory.
When a control mode is selected, sub-menus appear. The specific parameters for the re-
spective control mode can be set in these sub-menus.
10.2.1
Variable differential pressure Δp-v
specific parameters
When the control mode “Variable differential pressure ∆p-v” is selected, the following
parameters appear:
Universal
Display text
1.1.1
Control mode
1.1.2 Δp-v
Setpoint Δp-v
1.1.7
Emergency operation mode
1.1.8
Emergency operation speed
1.1.9
Setpoint source
1.1.10
Substitute setpoint
1.1.11
No-flow stop: ON/OFF
1.1.12
No-flow stop: limit
1.1.15
Pump ON/OFF
•
Setting the setpoint ∆p-v.
When selecting the menu item, the desired delivery head can be set as the setpoint.
Setpoint Δp-v
H target = 8.3 m
Universal
Display text
1.1.2 Δp-v
Setpoint Δp-v
H set =
H set =
NOTICE
The setpoint can only be set if the setpoint source is set to "Internal set-
point" (see Setting the setpoint source).
Setpoint source
Internal setpoint
Analogue input (AI2)
CIF module
Universal
Display text
1.1.9
Setpoint source
1.1.9 / 1
Internal setpoint
1.1.9 / 2
Analog input (AI2)
1.1.9 / 3
CIF module
•
Setting the emergency operating mode
In the event of a fault, the failure of the required sensor, an emergency mode can be defined.
When confirming the "Emergency operating mode" menu item, you can choose between
pump OFF and pump ON. When selecting Pump ON, another menu item “Emergency operat-
ing speed” appears. The emergency operating speed can be set here.
