Hitachi WJ200-001L, Instruction Manual, Page: 355 / 680

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20
EzCOM (Peer-to-Peer communication)
 Besides standard Modbus-RTU communication (slave), WJ200 supports
Peer-to-Peer communication between multiple inverters.

The max. number of inverter in the network is up to 247 (32 without repeater).

One administrator inverter is necessary in the network, and the other inverters
behave as master or slave.
 Be sure to set station No.1 as an administrator inverter, which controls master
inverter according to user setting. The others will be slave inverters. An admin.
inverter is fixed, but a master inverter always turns by rotation. For this reason, an
admin. inverter can be a master or a slave.
 A master inverter is able to write data to any holding register of designated slave
inverter. The max. number of holding register is up to 5. After writing data
completed, a master inverter will be shift to the next inverter.
 The max. number of master inverter is 8.
Note 1: The command to change a master is issued by an admin. inverter automatically, which
users do not have to take care.
Admin. inverter
(1)
Writing data to slaves by a
master (1).
スレーブへデータ送信
: Master inverter
Inverter
(2)
Inverter
(3)
Inverter
(4)
Command to change
a master inverter. (Note 1)
Command to change
a master inverter.
Command to change
a master inverter.
Writing data to slaves by a
master (2).
スレーブへデータ送信
Writing data to slaves by a
master (3).
スレーブへデータ送信
Writing data to slaves by a
master (4).
スレーブへデータ送信