Using The Rs485 Port Fitted As Standard - Toshiba TOSVERT VF-P7 Instruction Manual

6.30.2 Using the RS485 port fitted as standard

With the standard serial RS485, you can connect each inverter to a higher-order control system
(host computer) to set up a data communications network between inverters.
establish a data communications link between a computer and each inverter.
Serial RS485 connectors should be used to connect inverters to one another.
■Data transfer specification
Item
Interface
Transmission path
specification
Transmission distance
Number of
connectable units
Synchronization mode
Data transfer rate
Transmission character
Stop-bit length
Error detecting system
Error correction function
Response monitoring
Transmission code
Transmission waiting
time setting
Others
■An example of the connection of inverters linked to a computer
＜Selective communications＞
When an operation frequency reference is isued by the host computer to the inverter No.
Host computer
☆
ＩＮＶ
Ｎｏ. ０ ０
(IG)
Ignore: Inverters take no action if their numbers do not agree with the number specified in the
Use a terminal board, etc., to divide each cable into branches.
☆：
①
The host computer transmits data to inverters.
②
Each inverter receives data from the host computer and checks the number specified by the
computer against its number.
③
Only the inverter with the number that agrees with that specified by the computer decodes the
command and takes action according to it.
④ On completion of the action, the inverter returns the results of the action taken to the host computer,
with the inverter number added to this information.
⑤In this case, the inverter No. 3 only operates according to the operation frequency command
given by the host computer to it across the network
RS485
Half-duplex transmission [2/4-wire, bus architecture (A terminator needs
to be attached at each end of the system.)]
Up to 500 m (overall length of the cable)
Up to 32 units (including a host computer)
Up to 32
Asynchronous transfer
Default setting: 9600 bps (parameter setting)
Selectable from among1200, 2400, 4800, 9600, 19200 and 38400 bps
ASCII code ... JIS X 0201 8-bit (ASCII)
Binary code ... Binary code, 8-bit fixed
Received by inverter: 1 bit, sent from inverter: 2 bits
Parity: even/ odd/ non (parameter setting), check sum
Not provided
Not provided
Sending: 11 bit, Reception: 12 bit(with parity)
Possible
Action the inverter takes when an timeout occurs: tripping/alarm/no action
→When alarm is selected, "" blinks at the left end of the control panel.
When tripping is selected, "" is displayed on the control panel.
☆ ☆
ＩＮＶ ＩＮＶ
IG IG
Ｎｏ. ０ １ Ｎｏ. ０ ２
command( they ignore data received and get ready to receive the next data.)
Specification
：Wiring
：Data （Host→Inverter）
∼ ∼
：Return data（Inverter→Host）
☆
ＩＮＶ
IG
Ｎｏ. ０ ３
.
F-73
Also, you can
☆
ＩＮＶ ＩＮＶ
IG IG
Ｎｏ. ２ ９ Ｎｏ. ３ ０