User Guide for SpeedControl E 1045
• LS Control A/S • Industrivej 12 • DK –4160 Herlufmagle Page 7
• Tel: +45 5550 5550 • Fax:+45 5550 2265 • www.lscontrol.com • lsc@lscontrol.dk
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 chapter on Modbus). 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. In ACIM the down regulation function can be deactivated,
and the motor will stop if the current exceeds the current limit. 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 protection algorithm. The temperature setting for where the frequency converter should start to reduce
the speed can be lowered by means of the Modbus-interface. (See chapter on Modbus).
Skip areas
It is possible to enter up to 5 skip areas via the ModBus-interface. These skip areas may be used to avoid RPMs
where the application generates excessive noise or vibration. These areas are avoided in that the skip frequencies
in a given area automatically will be passed by the frequency converter, and in that way avoiding noisy and
vibrating operating frequencies. All skip areas is equipped with the same hysteresis value defined by a preset
distance from the RPM center. This distance determines how far away the frequency converter needs to adjust the
speed from the entered center RPM. See chapter on ModBus for detailed description on how to adjust these skip
areas. By default, they are all disabled.
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