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11.
OPERATION
11.1 Operation Modes
The operation mode of the inverter is classified into
the following three modes
-
the external
operation mode in which the inverter operation is controlled by the external signals, the PU opera-
tion mode in which the inverter operation is controlled by the parameter unit, and the combined
operation mode in which the inverter operation is controlled by both the externals signals and the
parameter unit.
Factory-set operation mode
When power is turned
ON
or
when the in-
verter is reset, the operation mode is
set to
"operation using external input
slgnals".
Therefore, the inverter can be operated using
the external signals when it is tumed ON. The
inverter starts operating
if the start signal
(STF/STR and SD) is turned ON in this state.
A speed reference signal is also required for
motor rotation.
To fix the operation mode
it is possible to set the operation mode which
is established when power is turned ON. For
example, if the inverter needs to
be
operated
only in the PU operation mode, it is possible
to set the PU operation mode as the mode to
be estaMished when power is tumed
O N .
In
this state, there is no need to press the opera-
t h e
p a r a m a m
unll.
d e v m (frequency
sen~ng
varlabl
operation
mode
aiter
turning
ON power.
* Freqwncy
IS
$91
mth
an 0Iternal
tion mode selection key
to select the PU
The procedure to set the default mode for the
mode which is established
when power is
turned on is explained on page 27.
-
25
-
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