5.1.2 Standalone Operation (Button Control Mode)
◼ When applying power, the system defaults into the ” and goes into the status
according to Figure 34. Levitation is disabled and the display indicates .
◼ Levitation can be enabled by pressing the button for 1 second (display shortly indicates ) or
by activating (typically 24V) the pin on the connector (see Table 11).
The system then goes into the status and is running at the speed, which is stored
in the EEPROM.
◼ The speed can be changed by pressing accordingly the and buttons. As long as the
digits on the display are blinking the set speed is shown. As soon as blinking stops the actual speed
is shown and the set-speed is stored in the EEPROM of the controller.
◼ The system can be disabled by pressing the button until 0 rpm is achieved. Pressing further
1 second the button the system disables levitation and shows on the display. The system
can also be disabled by deactivating (0 V) the pin on the connector
(see Table 11). Before disabling the system, the speed is automatically reduced to 0 rpm and the
impeller is properly touched down without grinding the wall.
◼ In case of an error the button (see Figure 24) can be used to restart the system or the power
can be switched off and on.
◼ For error analysis the codes described in Table 13 are displayed (blinking between and the
according code number).
◼ If the system shall be enabled automatically when power is applied, the pin on the
connector (see Table 11) has to be active (typically 24V). When switching on the power,
the system is running with the stored speed.
◼ For monitoring purposes, a digital output on the connector (see Table 11)
indicates the status of the system. When the impeller is rotating the digital output turns active.
The digital input is normally edge-triggered to allow control by digital input and buttons in order to
enable/disable systems simultaneously. An exception is, when the system is powered up or a system reset
occurs. Then the system checks the level of the digital input and switches to the desired state. Hence on
startup a high level of the digital input is sufficient to switch on the system and a transition from low
to high is not required.
5.1.3 Extended Operation (“Analog Control Mode”)
◼ In order to be able to control the pump with external signals (PLC) the mode
must be set with the display buttons. The and buttons have to be pressed simultaneously
for 5 seconds. The display should feedback the change by blinking between the stored speed value
and . The chosen mode is then stored in the EEPROM of the controller. After startup the system
returns to the operation mode selected previously.
◼ The system and levitation can be enabled/disabled with the digital input on the
connector (see Table 11). When disabling the running system, the speed is automatically reduced to
0 rpm and the impeller is properly touched down without grinding the wall. The display is blinking
between and OF. Alternatively button is also able to switch on system, with button
the system can be switched off.
◼ The speed can be set with an analog signal on the connector according to Table
11. It is strongly recommended to use galvanic separated signal values.
◼ For monitoring purposes, a digital output on the connector (see Table
11) indicates the status of the system. When the impeller is rotating the digital output turns
active.
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