Download SYSMAC CS/CJ/CP Series SYSMAC One NSJ Series

Section 3-7
Communications Frames
CMND
instruction
FINS message
FINS header
Network (Ethernet)
2804 Modbus-RTU command
FINS message
FINS header
Conversion Link Unit
Node address: 5
2804 Modbus-RTU command
Serial Communications Unit
Unit No. 3, port 1
CPU Unit
Protocol
conversion
Network (Controller Link)
Network address: 2
Example: Write data for frequency reference value
(FUNCTION code 10 hex, register No. 0002 hex)
Modbus-RTU command
Port 1 unit address:
80 hex + 4 hex × unit number 3 = 8C hex
RS-485 (Modbus-RTU)
3G3MV OMRON Inverter
List of Settings
• FINS Network Settings
Item
Value
(Example)
2
Send destination network
address
(Controller Link network
address of PLC to which
Serial Communications Unit
is mounted)
5
Send destination node
address
(node address in Controller
Link for PLC to which Serial
Communications Unit is
mounted)
Serial Communications Unit 3
unit number
92
Set 02 hex in the control data
C+2 bits 00 to 07 (network
address) of CMND(490).
Note: Set 0 hex in the control
data C+2 bits 08 to 11 (serial
port number) of CMND(490).
Set 05 hex in the control data
C+3 bits 08 to 15 (send destination node address) of
CMND(490).
Use to calculate the following
unit address for the serial port
80 hex + 4 hex × unit number 3
= 8C hex
Set 8C hex in the control data
80 hex + 4 hex ×
unit number 3 = 8C C+3 bits 00 to 07 (send destination unit address) of CMND(490).
hex (or 10 + unit
number 3 - 13 hex, (Alternatively, set 13 hex in the
and serial port num- control data C+3 bits 00 to 07
(send destination unit address)
ber 1 = 1 hex)
and set 1 hex in C+2 bits 08 to 11
(serial port number).)
Serial Communications Unit Port 1
serial port
Send destination unit
address
(unit address of serial port
on Serial Communications
Unit)
Setting location