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Details about Function Parameters
112
pump will be quickly started at the preset acceleration time. At this point, the output frequency
will not be set by the PID regulator.
When
F8-00, water level control is effective:
In water level control mode, the inverter will enter
the standby mode after receipt of execution commands and start up or shut down the water pump
according to water level signals (digital inputs 52 and 53; refer to Page 55). In operation, the
main pump and the auxiliary pump operate at full speed.
When F8-00=3,
pumps are started on by one in the sequence based on water pump capacity. The
system prescribes the min. capacity for Pump #1 (Pump #1<Pump #2<Pump #3...). When the
pump of a smaller capacity attains to the upper frequency limit, if the pressure is lower than the
settings, the current pump will be shut down and the pump of a larger capacity will be started up.
When the pump of a larger capacity is operating at a lower frequency limit and the pressure is
higher than the settings, the current pump will be shut down and the pump of a smaller capacity
will be started. In the case of a single pump in constant pressure operation, the working
frequency is set by the PID regulator.
CAUTION: In the working mode where F8-00 = 3, the settings for auxiliary pumps are
ineffective.
When F8-00=4, firefighting water supply is selected.
When firefighting water supply is
selected, regular patrols must be organized on a regular basis to prevent longtime disuse from
causing rusts. When the firefighting operation command is inputted, the system will quickly start
all the pumps at the largest water supply capacity. In this mode, the output frequency is not set by
the PID regulator.
F8-01
Water Pump Settings and Sleeping
Options
Factory
Settings
00001
Modification
×
Units digit: Number of variable-frequency cyclic switchover pumps
:
1~5
Tens digit: Number of auxiliary pumps : 0~4
Hundreds digit: Startup mode of auxiliary pumps
0: Direct startup 1: Startup by soft starter
Thousands digit: Sleeping and sleeping pump options
0: The sleeping pump is not selected 1: The sleeping pump works at a variable
frequency 2: The sleeping pump works at a line frequency 3: The main pump
is in sleeping mode
Setting
Range
Ten thousands digit: Drainage pump options
0: Drainage pump not under control 1: Drainage pump under control
Number of variable-frequency cyclic switchover pump s(main pumps):
These are pumps
capable of both variable-frequency operation and line-frequency operation. The max. number is 5
pumps.