Mitsubishi Electric FR-A802-P Instruction Manual page 30

System configuration (for operating two inverters in parallel)
• Wire the RS-485 terminals between the converter units and between the inverters as shown in the figure
details on wiring the RS-485 terminals, refer to
• Wire the terminals of the converter units and the inverters as shown in the diagram
converter units to inverters, refer to
• Set Pr.1001 Parallel operation selection of the inverter as shown in the following table. (For details on Pr.1001, refer to
the Parallel Operation Function Manual.)
Inverter Applied motor
Single wound motor
Master station
Multi-wound motor
Single wound motor
Slave station
Multi-wound motor
Parameter setting procedure (for driving a single wound motor)
1
Wire the RS-485 terminals of the inverters.
2
Set "1 or 2" in Pr.1001 of the slave inverter, and then reset the inverter.
3
Set "200" in Pr.1001 of the master inverter, and then reset the inverter.
Parameter setting procedure (for a multi-wound motor)
1
Wire the RS-485 terminals between the inverters.
2
Set "10201" in Pr.1001 of the slave inverter, and then reset the inverter.
3
Set "10200" in Pr.1001 of the master inverter, and then reset the inverter.
• Communication between the inverters will start automatically once the RS-485 terminals have been wired and Pr.1001 has
been set on all inverters.
NOTE
• Set up the slave inverter first before the master inverter by the Pr.1001 setting and the inverter reset. Otherwise, an error may
occur in communication between the inverters.
• For inverters that are connected in parallel, ensure that the 3-phase wiring between each motor and inverter is the same
length.
• The Parallel operation ready (Y227) signal will turn ON once the parameters are set and the RS-485 terminals have been
wired to the inverters correctly. (For details on the Y227 signal, refer to the Parallel Operation Function Manual.)
CAUTION
 Be sure to set Pr.1001 correctly. Operation with incorrect settings may damage the inverters.
 Ensure that the motor is wired to the inverter outputs (U, V, and W) in the correct phase sequence. Use the
correct phase sequence when wiring the master and slave inverter outputs. Otherwise the inverter may be
damaged.
page 55.)
page 34.)
Pr.1001 setting
200
10200
1 or 2
10201
Terminal connection diagrams
in page 30. (For details on wiring
INSTALLATION AND WIRING
in page 30. (For
2
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