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4.4. Broadcast communications function
Broadcast communication function can transmit the command (write the data) to multiple inverters by
one communication. Only the write (W, P) command is valid and the read (R, G) command is invalid.
The inverters subject to the broadcast communication are the same to the independent communica-
tion; 0 to 99 (00H - 63H) in the ASCII mode, and 0 to 63 (00H - 3FH) in the binary mode.
To avoid data deforming, the inverters to return data will be limited. A RS485 communication con-
verter unit (RS4001Z, RS4002Z or RS4003Z) will be needed to control multiple inverters on the net-
work.
■ “Overall” broadcast communications (ASCII mode / Binary mode)
- ASCII Mode
If you enter two asterisks (**) in the inverter number position of the data transmission format, the
computer will send the data simultaneously to all inverters (with an inverter number between 0 and
99 (00 to 63H)) on the network.
- Binary Mode
To put "FF" to the specified place of the inverter number in the communication format validates the
broadcast communication and the command is transmitted to all the applicable inverters in the net-
work (inverter numbers from 0 to 63 (00 to 3FH)).
<Inverter that returns data to the computer>
Data is returned from the inverter bearing the inverter number 00 only.
If you do not want inverters to return data, do not assign the number 00 to any inverter on the net-
work.
■ “Group” broadcast communications (ASCII mode only)
If you put “*?” In the inverter number position of the data transmission format, data will be sent
simultaneously to all inverters bearing a number whose digit in the one’s place in decimal notation
is”?”
If you put ”?*” In the inverter number position of the data transmission format, the data will be sent
simultaneously to all inverters bearing a number whose digit in the ten’s place in decimal notation
is”?”.
(“?”: Any number between 0 and 9.)
<Inverter that returns data to the computer>
Data is returned only from the inverter bearing the smallest number in the same group of inverters
(i.e., inverter whose number in the position of ”*” is 0).
If you do not want inverters to return data to the computer, do not assign a number having a 0 in the
position of “*” to any inverter on the network.)
■ Examples of broadcast communications
Ex: Set the frequency setting for communication to 60Hz.
1 Host computer → Multiple inverters: broadcast communications (ASCII Mode)
Example of transmission of data from host computer to inverter: (**PFA011770)
CR
Example of data returned from inverter to host computer: (00PFA011770)
CR
Data is returned from the inverter numbered 00 only, while commands are issued to all inverters
connected to the network.
2 Host computer → A specific group of inverters: group communications (ASCII Mode)
Example of transmission of data from host computer to inverters: (*9PFA011770)
CR
Example of data returned from inverter to host computer: (09PFA011770)
CR
Data is returned only the inverter numbered 09 only, while commands are issued to a maximum of
10 inverters bearing the number 09, 19, 29, 39, ... or 99.
3 Host computer → Multiple inverters: broadcast communications (Binary Mode)
Example of transmission of data from host computer to inverters: 2F FF 50 FA 01 17 70 00
Example of data returned from inverter to host computer: 2F 00 50 FA 01 17 70 01
Returning is possible only for the inverter that has the number 00, and the command is transmitted
to all the applicable inverter connected in the network.