BONFIGLIOLI ACTIVE Cube ACU 201-01 Operating Instructions Manual page 247

Parameter
In multiple motor operation, it is assumed that each data set is assigned to a corre-
sponding motor. For this, one motor and one motor protection switch are assigned to
each data set. In this operation mode, the rated values of the active data set are
monitored. The current output current of the frequency inverter is only taken into
account in the motor protection switch activated by the data set. In the motor pro-
tection switches of the other data sets, zero current is expected, with the result that
the thermal decay functions are taken into account. In combination with the data set
change-over, the function of the motor protection switch is similar to that of motors
connected alternately to the mains with their own protection switches.
In operation modes 101 and 111 additionally the integrated current over the time is
stored when the device is switched odd and set to the stored value when switched on
again.
Parameter
In single motor operation, only one motor protection switch, which monitors the out-
put current of the frequency inverter, is active. In the case of a data set change-over,
only the switch-off limits derived from the rated machine parameters are changed
over. Accumulated thermal values are used after the change-over as well. In the case
of the data set change-over, please ensure that the machine data are stated identi-
cally for all data sets. In combination with the data set change-over, the function of
the motor protection switch is similar to that of motors connected alternately to the
mains with one common protection switch.
In operation modes 102 and 122 additionally the integrated current over the time is
stored when the device is switched odd and set to the stored value when switched on
again.
Parameter
The internal state of the motor protection switch is latched reset stable. These set-
tings are to be used when regularly short mains interruptions occur. This way the
motor protection is considered correctly for short mains failures or short shut downs
of the application.
In settings 101, 102, 111 and 112 of
set in all data sets.
Motor protection, in particular self-ventilation motors, is improved via the
572 which can be set as a percentage of the rated frequency. The measured
limit
output current in operating points below the frequency limit is assessed by a factor of
2 higher in the calculation of the trigger characteristic.
No.
572 Frequency Limit
Output signals
Digital signals indicate the triggering of the function "Motor Protection Switch".
180 -
Warning Motor
Protection Switch
14 -
1)
For linking with inverter functions
2)
For digital output
Operating Instructions ACU
06/13
Multiple motor operation
571 = 1,11, 101 or 111
Operation Mode
Single motor operation
571 = 2, 22, 102 or 122
Operation Mode
571 = 101, 102, 111 or 122.
Operation Mode
Parameter
Description
1)
Triggering of the function "Motor Protection Switch"
according to
2)
Reset stable
571 the same values should be
Operation Mode
Settings
Min.
0 % 300 %
571 is signalized.
Operation Mode
Frequency
Max. Fact. sett.
0 %
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