11.3 Digital inputs
Function
Select one of these functions:
• Not active. When set to Not active, the input has no function.
• External stop. When the input is deactivated (open circuit), the
pump stops.
• Min. (minimum speed). When the input is activated, the pump
runs at the set minimum speed.
• Max. (maximum speed). When the input is activated, the pump
runs at the set maximum speed.
• User-defined speed. When the input is activated, the motor
runs at a speed set by the user.
• External fault. When the input is activated, a timer is started. If
the input is activated for more than 5 seconds, the pump is
stopped and a fault is indicated. This function depends on input
from external equipment.
• Alarm resetting. When the input is activated, a possible fault
indication is reset.
• Dry running. When this function is selected, lack of inlet
pressure or water shortage can be detected. When lack of inlet
pressure or water shortage (dry running) is detected, the pump
is stopped. The pump cannot restart as long as the input is
activated. This requires the use of an accessory, such as these:
- a pressure switch installed on the inlet side of the pump
- a float switch installed on the inlet side of the pump.
• Accumulated flow. When this function is selected, the
accumulated flow can be registered. This requires the use of a
flowmeter which can give a feedback signal as a pulse per
defined volume of water.
• Predefined setpoint digit 1 (applies only to digital input 2).
When digital inputs are set to predefined setpoint, the pump
operates according to a setpoint based on the combination of
the activated digital inputs. See section Predefined setpoints.
The priority of the selected functions in relation to each other
appears from section Priority of settings.
A stop command has always the highest priority.
Activation delay
Select the activation delay (T1).
This is the time between the digital signal and the activation of the
selected function.
Range: 0 to 6000 seconds.
Duration timer mode
Select the mode.
• Not active
• Active with interrupt (mode A)
• Active without interrupt (mode B)
• Active with after-run (mode C).
Select the duration time (T2).
This is the time which, together with the mode, determines how long
the selected function is active.
Range: 0 to 15.000 seconds.
T input
DI
A
B
C
T input > T1 + T2 T input < T1 + T2
T1 T2
T1 T2
T1 T1 T2T2
T1
T1
T input
T2
TM064949
Duration timer function of digital inputs
Pos. Description
A Mode A
B Mode B
C Mode C
DI Digital input
Factory settings
See section Factory settings.
Related information
11.8 Predefined setpoints
14. Priority of settings
21.6 Factory settings
11.4 Digital inputs/outputs
You can select if the interface is to be used as input or output. The
output is an open collector and you can connect it to, for example,
an external relay or controller, such as a PLC.
TM064463
Example of configurable digital inputs/outputs
Pos. Description
1 External controller
To set a digital input/output, make the settings below.
Mode
You can set the digital input/output 3 and 4 to act as digital input or
digital output:
• Digital input
• Digital output.
Function
You can set the digital input/output 3 and 4 to the functions stated in
the table below:
Possible functions, Digital input/output 3
Function if input
See details in section Digital
input.
Function if output
See details in section Signal
relay 1 and 2 (Relay outputs).
Not active
External stop
Min.
Max.
User-defined speed
External fault
Alarm resetting
Dry running
Accumulated flow
Predefined setpoint digit 2
Not active
Ready
Alarm
Operation
Pump running
Warning
Limit 1 exceeded
Limit 2 exceeded
28
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