Co-Inverter Communication Setting - Omron 3G3MX2 User Manual

6-7 Co-Inverter Communication
*3. Set 01 (C072 = 01) as the station number of the Management Inverter.
*4. If the Communication Error Selection of the Management Inverter is set to other than "Ignore" (C076
= 02), Co-inverter communication will stop once the management Inverter experiences a
communication timeout. In this case, reconnect or perform a reset (by turning the RS terminal ON and
then turning if OFF).
*5. If input terminal start is selected for the Co-inverter Communication Start Selection (C100 = 00),
allocate 81 to one of multi-function inputs S1 to S7/EB (485: Start Co-inverter Communication).
*6. If constant communication is selected for the Co-inverter Communication Start Selection (C100 = 01),
the Management Inverter starts sending data the moment the power is input. If starting of the Inverter
to switch the master to is delayed and thus receiving of the master switching command fails, the
Master Inverter cannot send data and consequently the Management Inverter experiences a receive
timeout.
If C100 = 01 is selected, confirm starting of all other Inverters and then start the Management Inverter.
*7. Although the station number of the recipient slave is set in master-slave communication, actually this
communication is performed as broadcast communication (station number: 00). Accordingly, data is
sent to all stations. The data received by a slave not specified as the recipient by the master will be
discarded.
*8. If multiple Master Inverters are provided, set consecutive station numbers for the Inverters.
Communication cannot be performed if the numbers are discontinuous.
*9. Make sure that C098 is equal to or smaller than C099.

Co-inverter Communication Setting

Set (C072) a station number for each of the Inverters performing Co-inverter communication by
avoiding duplicate numbers. Be sure to set station number 01. The Inverter of station number 01
becomes the "Management Inverter".
For the Management Inverter, set Communication Selection (C096) to "02: Co-inverter
6
communication (management)". For all other Inverters, set Communication Selection (C096) "01:
Co-inverter communication".
Set the station number for Master Inverter in the Management Inverter (C098, C099).
Set the Inverter communication starting method in the Management Inverter (C100). If "00: 485
terminal" is selected for Co-inverter Communication Start Selection (C100), allocate "81: 485
(Start Co-inverter communication)" to one of multi-function Inputs 1 to 7.
Set in the Master Inverter the number of send data items, recipient station number, recipient
register and sender register for which the Master Inverter writes into.
Inverter-Inverter Communication Operation
(1) The Master Inverter sends data to each slave inverter according to the items set in the
(2) The Management Inverter sends a master switching command and the Master Inverter
(3) The next Master Inverter sends data to each slave inverter in the same manner as in (1).
(4) (2) and (3) are repeated.
Note: Since the Inverter communication is performed in the form of broadcasting (station number: 00), all
6-25
Master Inverter.
changes.
communication data are sent to all stations. Accordingly, while a slave not specified as the recipient
of the Master also receives data, if the data is not addressed to that slave the data will be discarded
in the slave.
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