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62 Program features
• Fixed intervals
(
: The starting sequence is shifted periodically at pre-defined
intervals (parameter
). In traditional pump control, the pump
speed must also be below the level defined by parameter
.
• Runtime equalization
: The starting sequence is rearranged when the
difference between the runtimes of two pumps exceed a limit,
In the new sequence, the pump with the lowest runtime will be started first, the
pump with the highest runtime will be started last.
• Autochange when stopped
(
: The starting sequence is shifted every time
the drive (in traditional pump control) or the master drive (in multipump or level
control) stops.
All pumps take part in the autochange sequence, except in a traditional pump control
configuration where a fixed pump is controlled by the drive at all times and the
remaining pumps are only turned on/off by the drive logic (an example is shown
starting on page
). In this case, the fixed pump is always started first, and the
starting sequence of the auxiliary pumps is determined by the autochange function.
Settings
Parameter group
Diagnostics
…
(pump runtime counters; page
(page
),
(page
(page
(page
),
(page
(page
Flow calculation
The flow calculation function provides a reasonably accurate (typically ±3…6%)
calculation of the flow without the installation of a separate flow meter. The flow is
calculated on the basis of parameter data such as pump inlet and outlet diameters,
pressure at pump inlet and outlet, height difference of pressure sensors, and pump
characteristics.
The user can either define a PQ (power/flow) or HQ (head/flow) performance curve
that is used as the basis for the calculation. It is also possible to use both curve types
together with a breakpoint setting.
Notes:
• The flow calculation function is not to be used for invoicing purposes.
• The flow calculation function cannot be used outside the normal operating range
of the pump.
Содержание ACQ810
Страница 1: ...ABB industrial drives Firmware manual Standard pump control program for ACQ810 drives ...
Страница 4: ......
Страница 14: ...14 About the manual ...
Страница 56: ...56 Control locations ...
Страница 97: ...Application macros 97 ...
Страница 98: ...98 Application macros ...
Страница 100: ...100 Application macros ...
Страница 101: ...Application macros 101 ...
Страница 106: ...106 Application macros 75 01 Operation mode Multipump 76 01 Enable MF comm Yes ...
Страница 356: ...356 Control through the embedded fieldbus interface ...
Страница 366: ...366 Control through a fieldbus adapter ...
Страница 374: ...374 Control block diagrams ...