54
FINS Commands with Host Link Protocol Section 3-5
Control Words
Control data must be set before CMND(490) is executed. The control data is
written in the following format, starting from the first control word.
Number of Bytes of Command Data
Set the number of bytes of command data (including the command code)
that are stored from the first command word
Number of Bytes of Response Data
Set the number of bytes of response data (including command code and
end code) that are stored from the first response word.
Serial Port Number
Set the serial port number to which the host computer is connected.
Destination Network Address
Set the network address of the destination node (i.e., the computer). Set
“00” to send communications within the local network.
Destination Node Address
Set the node address of the destination node (i.e., the computer). Set “00”
when transmitting within the local PLC.
Destination Unit Address
Set the unit address of the Unit to which the host computer is connected.
Response Setting
Normally this bit is set to 0 to require a response. When a response is not
required, set this bit to 1.
Communications Port Number
Set the port number in the CPU Unit which will transmit CMND(490).
Word Bits 00 to 07 Bits 08 to 15
C Number of bytes of command data
C+1 Number of bytes of response data
C+2 Destination network address Bits 08 to 10: Serial port number
C+3 Destination unit address Destination node address
C+4 Bits 00 to 03: No. of retries Bits 08 to 10: Comm. port number
Bits 15: Response setting
C+5 Response monitor time
Unit No. Header
code
Response
wait time
ICF RSV GCT DNA DA1
DA2 SNA SA1 SA2 SID Command code Data (1,080
characters
max.)
FCS Terminator
xx xxxxx
xxxxxxxxxxxxxx
xx
*
xx
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