Additionally, you can activate the "Memory" function extension (Identifier
"m"). When "Memory" is activated, the pump adds up the remaining
strokes , which could not be processed, up to the maximum capacity of the
stroke memory of 65,535 strokes. If this maximum capacity is exceeded,
the pump goes into fault mode.
With "Pulse control" you can optimally adapt the pump to the relevant
process, for example in conjunction with contact water meters.
10.5.4
"Analog" operating mode settings
Alongside the setting menus, which are described in more detail in
Ä Chapter 10.6 ‘Programmable function settings ("Settings" menu )’
on page 47
, in
‘Analog’
operating mode in the
‘Settings’
menu, the
‘ANALOG’
menu is also available. The stroke rate is controlled using an
analog current signal via the "External control" terminal. The continuous
display "Signal current" of the 2nd level indicates the incoming current.
You can select three types of current signal processing:
n
‘0 - 20 mA’
n
‘4 - 20 mA’
n
‘Curve’
At 0 mA the pump is stationary -
At 20 mA the pump works at the maximum stroke rate.
Between these values, the stroke rate is proportional to the current signal.
PP
P
P
Analog
Analog
0..20mA
4..20mA
Curve
P
Settings
Analog
Analog
Concentration
Auxiliar
Calibration
P
Main
Analog
Mode
Settings
Security
Clear
0..20
0..20
0..20
Continuous
display
At 4 mA the pump is stationary -
At 20 mA the pump works at the maximum stroke rate.
Between these values, the stroke rate is proportional to the current signal.
For current signals less than 3.8 mA an error message appears and the
pump stops (e.g. if a cable has broken).
The maximum stroke rate can only be reduced under pro‐
cessing type ‘Curve’ , not under processing types "0 .. 20"
and "4 .. 20".
PP
P
P
Analog
Analog
0..20mA
4..20mA
Curve
P
Settings
Analog
Analog
Concentration
Auxiliar
Calibration
P
Main
Analog
Mode
Settings
Security
Clear
0..20
0..20
0..20
Continuous
display
"Memory" function extension
Contact water meter
0 - 20 mA
4 - 20 mA
Set up
45
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