GA05141_0702 - 09/2004
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Plug-in control
Stand-by operation
The pumping system can be operated in a stand-by mode with reduced
speed. The speed can be set in the operating menu “pump”. The function
stand-by can be activated with the digital inputs option 1 or 2.
Do not use at the same time the stand-by function and the speed con-
trol via the analog input.
Overload
The speed is continuously monitored and controlled. If the speed, even at
maximum current, cannot be held at the setpoint, as a result of external
influences, e.g. excessive gas intake, the speed reduces until the converter
goes into the “Overload” operating condition when the programmable fre-
quency threshold is fallen below (refer to the menu “settings pump/Normal
Operation”). The acceleration time is restarted. If the converter hasn’t gone
into the normal operating mode after the monitoring time, it is shutdown
with the failure message “Failure Overload Time”.
Mains Down
If the power fails while the pump is running the pump generates the power
necessary to operate the MAG.DRIVE
digital
up to a minimum frequency of
110 Hz. When the power returns, the pump is again accelerated up to the
frequency setpoint.
The acceleration time is now restarted. If the converter hasn’t gone into the
normal operating mode after the monitoring time, it is shutdown with the
failure message “Accel. Time”.
If the system is running in the normal operation mode, then in the case of
an occurring mains failure the corresponding relay contact "Normal opera-
tion” will be disabled with a delay. Brief mains voltage interruptions of less
than five seconds will not have an influence on the relay output provided the
speed of the pump does not drop within this time span below the speed
limit set up through the normal operation factor or if a stop process was
initiated.
Deceleration
After a stop command, the pump is braked down to a speed < 5 Hz as
quickly as possible. A brake resistor is integrated into the converter which
converts the regenerative energy into heat.
Failure
The converter was shutdown with a failure message and waits for a failure
acknowledgement after the failure has been removed. The failure type can
be read from the display. The failure message can be acknowledged by
depressing the STOP key or via the digital input “option”, when the pump
stands still (f < 5 Hz).
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