4-62
Connect each inverter in parallel as shown below. It is necessary to short terminals RP and SN on the last
inverter in the link (even if communication is to only one inverter the link should still be made).
By shorting between RP and SN, the terminal resistance is increased and controls the reflection of the
signal.
(2) Setting
The following settings are required to operate RS485 communication.
SP SN RP SN
SP SN RP SN
External
control
machines
_ _ _
SP SN RP SN
Set item
Function
code
Set value
Description
02
Operator
03
RS485
04
Option 1
Data command
C070
05
Option 2
02
Loop-back test
03
2400 bps
04
4800 bps
05
9600 bps
Communicating transmission
speed
C071
06
19200 bps
Communication code
C072
1 to32
This assigns the station number of the inverter.
This is used when you control more than one
simultaneously.
7
7 bit
Communication bit
C073
8
8 bit
00
No parity
01
Even parity
Communication parity
C074
02
Odd parity
1
1 bit
Communication bit
C075
2
2 bit
Communication waiting time
C078
0 to 1000
Units :ms
(3) Communication procedure reference
Chapter 4 Explanation of function