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Communications Frames Section 3-7
Settings
• FINS Network Settings
• Host Link FINS Settings
Command Frame
Response Frame
[CMND S D C]
Item Value (example) Setting location
Send destination network
address
(network address allocated
to target serial port in routing
tables)
Network address for
serial communica-
tions path allocated
in local network
table settings is 5
• Set 05 hex in bits 00 to 07 (net-
work address) of control data
C+2 in the CMND(490) instruc-
tion.
Note Set 0 hex in bits 08 to 11
(serial port number) of
control data C+2 in the
CMND(490) instruction
Send destination node
address
(unit number for Host Link of
PC connected to target
serial port + 1)
Remote PC unit
number for Host
Link: 1
Therefore, set 1+1
= 2
• Set 02 hex in bits 08 to 15
(send destination node
address) of control data C+3 in
the CMND(490) instruction.
Send destination unit
address
(unit address of remote unit
on PC connected to target
serial port)
CPU Unit: 00 hex • Set 00 hex in bits 00 to 07 of
control data C+3 in the
CMND(490) instruction.
Serial Communications Unit
unit number
6 Use the following equation to
calculate the unit address of the
serial port.
81 hex + 4 hex
× unit number 6
= 99 hex (153 decimal)
Use CX-Net to set the local net-
work tables in the routing tables.
Unit number Network
address
Serial Communications Unit
serial port
Port 2
Serial Commu-
nications Unit’s
serial port unit
address: 153
(decimal)
Serial port net-
work address: 5
(decimal)
Item Setting Setting location
FINS command code (e.g., change
operating mode (stop operation))
0402 hex Set in 0402 hex of control
data S for CMND(490)
instruction
FINS command parameter (e.g.,
always FFFF hex to change operating
mode)
FFFF hex Set in FFFF hex of control
data s+1 for CMND(490)
instruction
Item Setting Setting location
FINS command code (E.g., change
operating mode (stop operation))
0402 hex Stored in D of CMND(490)
instruction
FINS command end code (normal end:
0000 hex)
0000 hex Stored in D+1 of CMND(490)
instruction
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