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17
OPERATION
There are 4 operating modes for the pulse operation:
■
Reduction
In this mode, a reduction of the received pulses is performed. This means that the pump
will only perform a stroke after an adjustable number of pulses (reduction factor) has been
received.
■
Transmission
In this mode, a transmission of the received pulses is performed. This means that the pump
will perform an adjustable number of strokes (transmission factor) after each received pulse.
■
1/1
In this mode, the pump performs exactly one stroke for each received pulse.
Selecting the PULSE FACTOR
Depending on the selected pulse mode, the pulse factor corresponds either to the reduction
factor or the transmission factor.
The
reduction
factor can be selected between 1 and 999. For example, if a reduction factor of
50 is selected, then the pump will only perform a stroke with every 50th received pulse.
The
transmission
factor can be selected between 1 and 999. For example, if a transmission
factor of 50 is selected, then the pump will perform 50 strokes with every received pulse.
Switching the PULSE MEMORY ON/OFF
The pump is equipped with a pulse memory, which can optionally be switched ON and OFF.
A maximum of 999 strokes can be saved.
If the number of received pulses exceeds the number that can be handled by the pump, then the pulses will be buffered and the
strokes will be performed later.
ANALOGUE operating mode
ATTENTION
To avoid damaging the pump, perform parametrisation of the inputs and outputs before connecting the control cable.
4-20 mA
A signal with a control current of 4mA corresponds to 0 % stroke
frequency; a signal with 20 mA corresponds to 100 % stroke frequen-
cy. In this range, the stroke frequency behaves proportionally to the
control current (see following figure).
If the input signal is < 3.5 mA, the pump outputs an error code for an
analogue signal < 4 mA. Thus, a wire break (control current = 0 mA)
can be detected. If the input signal is > 20.5 mA, the pump stops and
the error code for the analogue signal > 20 mA is output.
4
8
12
16
20
20
100
80
40
60
0
0
4-20m A
Speed [%]
Current [mA]
