Communication Settings - Omron RX2 Series User Manual

9-6-2

Communication Settings

• On each inverter, set the station number in the Communication Station No. Selection so that
they do not overlap among the inverters. Do not forget to set the station No. 1, which serves
as the management inverter.
• Set Management Inverter Communication Method Selection (CF-08) to 03 (Inter-inverter
Communication (Management). Set Other Management Inverter Communication Method
Selection (CF-08) to 02 (Inter-inverter Communication).
• Set a station number 1 to 8 on inverters that serve as the master inverter. To switch the mas-
ter inverter among more than one inverter, the station numbering must be sequential. On the
management inverter, set the smallest master station number in the Co-inverter Communica-
tion Starting Station Number (CF-20) and the largest master station number in the
Co-inverter Communication Ending Station Number (CF-21).
• In the Co-inverter Communication Start Selection, set how to start inverter communications.
When Inter-inverter Communication Start Selection is set to 00 (Start via input terminal),
assign 98 (EzCom start) to one of the Multi-function Input S1 to S7 Selection (CA-01 to
CA-07).
• In CF-23 to CF-38, set the following parameters, which are required when the master inverter
writes data: the number of sent data, recipient station number, recipient register address, and
sender register address.
Inter-inverter Communication Operation
(1) The master inverter sends data to one or more slave inverters according to the set-
tings for that master inverter.
(This data is also sent to the management inverter that does not serve as the master
inverter.)
(2) The management inverter sends the master switching command and the master
inverter is switched accordingly.
(3) The next master inverter sends data to one or more slave inverters in the same man-
ner as explained in step (1).
(This data is also sent to the management inverter that does not serve as the master
inverter.)
(4) Steps (2) and (3) are followed repeatedly.
Note Because this inverter is designed to establish co-inverter communication as broadcast communications
(Station No. 00), communications data is sent to all stations. Therefore, slaves that are not specified as the
recipient on the master side receive the data once, but discard internally the data not addressed to them.
High-function General-purpose Inverter RX2 Series User's Manual
9 Communications Functions
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