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Issue 08/03
3

50Hz / 60Hz Switch

CAUTION
This is a very critical step in the commissioning of a drive in North America.
On the MM440 there is a DIP switch that is used to select either 50Hz or 60Hz operation. This is
referring to the nominal motor frequency being used.
The factory frequency setting (50Hz) can be adapted to NEMA frame motors (60Hz - typically used in
North America) by using the DIP2(2) switch behind the I/O board.
At power up, the position of the DIP2(2) switch determines the setting of P0100, if P0100 = 0 / 1 then
the DIP2(2) switch position has priority over the parameter value and will reset it according to the
DIP2(2) position. If P0100 is set to 2 then the DIP2(2) switch is ignored.
After power cycling the drive following a change in DIP2(2) position, the parameters for the rated
motor frequency (P0310), max. frequency (P1082) and reference frequency (P2000) are automatically
pre-set to 50Hz/60Hz defaults (depending on switch position).
In addition, the rated motor parameters as well as all of the other parameters which depend on the
rated motor parameters are reset. The units of the power parameters are, depending on P0100, either
interpreted as kW value or hp value.
NOTE
Switch DIP2(1) behind the I/O board has no function.
DON'T FORGET THIS STEP
See section 3.1 for instructions
MICROMASTER 440
Quick Start Guide
33
6SE6400-5GA00-0BP0

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Mm440

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