N700 Operating Instructions and Parts Manual
13. Communication function
141
(1) RS485
Communication
specification
Item
Specification
Notes
Communication interface
RS485
SW2 (3-4) (Right position)
Communication methods
Half duplex communication methods
Transmission speed
(Baud Rate)
2400/4800/9600/19200/38400[BPS] Selection with operator (b038)
Start methods
Response for the external read, write
command
The inverter operates only as
slave.
Transmission code
Binary code
Data bit
7/8[bit]
Selection with Operator (b040)
Parity
No parity/even/odd
Selection with Operator (b041)
Stop bit
1/2[bit]
Selection with Operator (b042)
Connect form
1:N(N=Maximum32)
Selection with Operator (b039)
Main function
Fleming/CRC/CMD/MAXREQ/Parameter
Table 13- 2 RS485 Communication specification
(2) RS485
Communication
setting
Connect each inverter by multiple and short in case of the end inverter by using JP2 jumper.
(Although RS485 communication is used to one inverter, short JP2 jumper as an equal
method.) RS485 communication requires a termination resistor. The N700 has built-in terminal
resistor that by shorting JP2 jumper, the termination resistor of the control terminal is valid and
enables to control the reflection of a signal.
(Refer to clause 13.1 Communication function on page 139)
The following setting are required to operate RS485 communication
Note)
If the data commend setting is communication, the operator can be management only
stop key and b037 code.
Function code
Set item
Initial data
Data
Description
0(OPERATOR) Reserved
1(RS485) RS485
2(OPT1)
Reserved (Option 1)
3(OPT2)
Reserved (Option 2)
b037 Data
command 0
4(RS232) RS232
0(2400BPS) 2,400
BPS
1(4800BPS) 4,800
BPS
2(9600BPS) 9,600
BPS
3(19200BPS) 19,200
BPS
b038
Communicating
transmission
speed
2
4(38400BPS) 38,400
BPS
b039
Communication
code
1 1~32
This assigns the station number of the
inverter. This is used when you control
more than one simultaneously.
7(7BIT) 7bits
b040
Communication
bit
8
8(8BIT) 8bits
0(NO PARITY)
No parity
1(EVEN PARITY)
Even parity
b041
Communication
parity
0
2(ODD PARITY)
Odd parity
1(1BIT) 1bit
b042
Communication
stop bit
1
2(2BIT) 2bit
Table 13- 3 RS485 Communication specification