User Guide for SpeedControl 1047
• LS Control A/S
• Industrivej 12
• DK –
4160 Herlufmagle
Page 6
• Tel: +45
5550 5550
• Fax:+45
5550 2265
Description of Functions
Supply
The frequency converter is supplied by 230VAC ±10%. However, it is possible to lower the voltage, but it is
not recommended to use a supply less than 200VAC.
Control Voltage
1
–
10 Vdc = min. rpm
–
max. rpm (6 phase motor => 200rpm
–
1000rpm => 10
–
50 Hz). If control voltage
gets lower than 1 Vdc the frequency converter will run min. rpm. The control voltage levels can be adjusted
via the Modbus-interface. (See separate ModBus document).
RUN input
If the RUN input is activated (added to GND from internal supply) the frequency converter will start the
motor. The RUN input can be disabled through the Modbus-interface. (See separate ModBus document).
Alarm Relay
The frequency converter is supplied with an alarm relay which is activated when there are no faults. If the
frequency converter must stop due to severe error, the relay will be deactivated (it changes position). The
alarm relay is deactivated when supply is disconnected. The function of the alarm relay can be changed via
the Modbus-interface. (See separate ModBus document).
HW Stop switch
The frequency converter is supplied with a Hardware (HW) Stop switch function. This HW Stop Function can
be used with a switch (e.g. a pressure switch or a thermal switch). The Switch must be connected between
connector 16 and 17, and it must be closed for the frequency converter to run the motor. If the switch is
open, the frequency converter is stopped, and it will not be able to restart, until the supply voltage has
been disconnected long enough for the frequency converter to come to a complete stand still.
If not used, connector 16 and 17 must be shortend.
Current Limits
Current limits can only be adjusted via the Modbus-interface. (See separate ModBus document). The
current limits are as standard set to the current printed on the motor plate. When the frequency converter
registers that the current limit is exceeded, it will automatically reduce the speed of the motor. However,
the speed will never be reduced further than minimum speed. The time delay before the motor stops
depends on the current and the overrun time which are integrated into the intelligent protection algorithm
in the control.
Temperature
The temperature function is set to ensure that if the frequency converter power unit registers an excess temperature
it will reduce the motor speed. However, the speed will never be reduced further than the minimum speed. The
motor speed reduction will be slow. Should the temperature continue to increase, despite the speed reduction, the
frequency converter will stop and indicate error. The temperature reduction function is part of the intelligent
