Inter-drive communications | Toshiba VF-A7 instruction

＜Broadcast communications＞

When the host computer to inverters broadcasts an operation frequency reference.

Host computer

：Wiring

：Data （Host→Inverter）

☆	☆	☆	☆	〜〜
				〜〜

ＩＮＶ	ＩＮＶ	ＩＮＶ	ＩＮＶ
Ｎｏ.００	Ｎｏ.０１	Ｎｏ.０２	Ｎｏ.０３

☆

ＩＮＶＮｏ.２９

ＩＮＶＮｏ.３０

☆：Use a terminal board, etc., to divide each cable into branches.

①The host computer transmits data to inverters.

②Each inverter receives data from the host computer and checks the number specified by the computer against its number.

③If an asterisk (＊) is marked in place of an inverter number, all inverters judge the data to be common to them (broadcast message), decode the command and take action.

④To avoid collision between data sets, data from the inverter with an a zero instead of an asterisk only is sent back to the host computer.

⑤In this case, all inverters operate, following the operation frequency command given by the host computer across the network.

Note) Data can also be broadcast to a specific group of inverters (group broadcast communication

s)by putting a number common to each inverter in the group.(This function is usable only in ASCII mode.)

(Ex.) If "＊1" is designated, data is broadcast to all inverters bearing the numbers 01, 11, 21, 31, ... 91, and data from the inverter bearing 01 only is sent back to the host.