52
FINS Commands with Host Link Protocol Section 3-5
Note To execute SEND(090) normally, programming needs to be written to process
the data received by the host computer and return the proper response.
RECV(098) By using RECV(098), data from the host computer can be written to a mem-
ory area in the CPU Unit.
Command Format Received by the Host Computer
The FINS command transmitted to the host computer when RECV(098) is
executed is MEMORY AREA READ (command code 0101). The command
format received by the host computer is shown in the following diagram.
Refer to MEMORY AREA READ: 0101 in Section 5 FINS Commands for
details
Control Words
Control data must be set before RECV(098) is executed. The control data is
written in the following format, starting from the first control word.
Number of Read Words
Set the total number of words of data to be read from the host computer.
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.
Communications Port Number
Set the port number in the CPU Unit which will transmit RECV(098).
Word Bits 00 to 07 Bits 08 to 15
C Number of read words
C+1 Destination network address Bits 08 to 10: Serial port number
C+2 Destination unit address Destination node address
C+3 Bits 00 to 03: No. of retries Bits 08 to 10: Comm. port number
C+4 Response monitor time (unit: 0.1 s)
Unit No. Header
code
Response
wait time
ICF RSV GCT DNA DA1
DA2 SNA SA1 SA2 SID Command code
Memory area
code
Beginning
read address
Number of read
elements
FCS Terminator
xx xxxxxxx
xxxxxxxxxx xx
xxxxxxxxxxxx
*
xx
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