Table of Contents
1.4.7
Connection of multiple inverters using RS-485
terminals
When inverters have RS-485 terminals, RS-485 terminals are used for connecting multiple inverters with a serial port of a
computer. Up to 32 inverters can be connected. Serial/RS-485 converter (on
Related parameters for multiple connection using RS-485 terminals or PU
connector
Set the following communication parameters for connection using RS-485 terminals or PU connector of the inverter.
To set parameters or input operation commands, set the following parameters and switch the operation mode as shown in the
following table.
Communication
Inverter
option
FR-A800
FR-B
Not connected
FR-B3
FR-B4
FR-F800
FR-A700
FR-B (700)
Connected
FR-B3 (700)
FR-F700
FR-F700P
Not connected
FR-E800
FR-E700
FR-D700
Connected
FR-E700EX
FR-CS80
FR-D700
—
FR-D700-G
NOTE
• For the details of wiring, refer to the Instruction Manual (Detailed) of the inverter.
• Set 3 s or more (or 9999) in Pr.122 PU communication check time interval, Pr.336 RS-485 communication check time
interval.
• Set a station number of each inverter in Pr.117 PU communication station number and Pr.331 RS-485 communication
station number for multiple connection. Perform inverter reset after setting the parameter.
48
1. OUTLINE
1.4 Connection and parameter setting
Serial port
Personal computer
-
RS-232C
(FR Configurator2)
converter
RS-485 terminal block
Inverter
Communication parameter
Set the station number of each inverter in
Pr.331 RS-485 communication station
number (for multiple connection)
Pr.336 RS-485 communication check time
interval ≠ "0" (initial value: "0")
Pr.337 RS-485 communication waiting time
setting = "9999" (initial value)
Set the station number of each inverter in
Pr.117 PU communication station number
(for multiple connection).
Pr.122 PU communication check time
interval ≠ "0" (initial value: "0")
Pr.123 PU communication waiting time
setting = "9999 (initial value)"
Set the station number of each inverter in
Pr.117 PU communication station number
(for multiple connection).
Pr.122 PU communication check time
interval ≠ "0" (initial value: "0")
Pr.123 PU communication waiting time
setting = "9999 (initial value)"
page
Serial cable
-
RS-485
RS-422 / 485
Parameter setting
Pr.550 NET mode operation command
source selection= "9999" (initial value:
"9999")
Pr.551 PU mode operation command
source selection = "1" (initial value:
"9999")
Unchanged from the initial value.
Pr.551 PU mode operation command
source selection = "2" (initial value:
"9999")
Unchanged from the initial value.
Pr.551 PU mode operation command
source selection = "2" (initial value:
"9999")
34) is required.
Up to
32 inverters
Command source parameter
Operation
mode
NET
PU
NET
PU
NET
PU
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