Setting parameters for parallel operation
56
2.9
Setting parameters for parallel operation
Parallel operation selection (Pr.1001)
• To operate two converter units in parallel, set "200", and "1" or "2" in
Pr.1001 Parallel operation selection
of the master
and slave converter units respectively. (Setting either slave 1 or 2 will perform the operation.)
• To operate three converter units in parallel, set "300", "1", and "2" in
Pr.1001
of the master, slave 1, and slave 2 converter
units respectively.
• Set "100 (initial value)" in
Pr.1001
to enable operation using just one converter unit in the event of an emergency.
NOTE
• The setting of
Pr.1001
will be applied after next power ON or converter unit reset.
• When the operation panel is installed to the converter units, the first monitor screen shows SLV.1 (parallel operation slave 1)
on the slave 1 converter unit (
Pr.1001
= "1") and SLV.2 (parallel operation slave 2) on the slave 2 converter unit (
Pr.1001
=
"2").
Precautions when setting parameters for parallel operation
• Always set
Pr.1001
of the master and reset the converter unit after setting
Pr.1001
of the slave and resetting the converter
unit. If the parameter is set in the reverse order, the communication between the master and the slave may not be
performed correctly.
• Before the parallel operation, set the same values between the master and the slave in
Pr.30
,
Pr.57
,
Pr.261
, and
Pr.598
. If
the settings are not correct, parallel operation will not work correctly.
Resetting the converter during the parallel operation
• When the RES signal of the master remains ON, the master keeps attempting to perform the converter reset. However, the
slave performs the converter reset only once and does not keep attempting to perform the reset.
• For the converter reset, reset the master converter unit. The slave converter unit will be reset simultaneously.
Pr.
Name
Initial value
Setting range
Description
Master/slave station
Number of slave station
1001
E390
Parallel operation
selection
100
1
Slave station 1
—
2
Slave station 2
—
100 (initial value)
Master station
0
200
1
300
2
CAUTION
Be sure to set Pr.1001 correctly. Operation with incorrect settings may damage the converter units.
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