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How to Use FINS Commands Section 6-1
6-1 How to Use FINS Commands
FINS commands can be issued to the Loop Controller by one of the following
two methods:
1. By the CMND (DELIVER COMMAND) instruction from the CPU Unit
2. By the Host Link or the networked host computer
1) By the CMND (DELIVER COMMAND) instruction from the CPU Unit
FINS commands can be issued to the Loop Controller by executing the CMND
(DELIVER COMMAND) instruction in the program on the CPU Unit or net-
worked PLC (CPU Unit) on which the Loop Controller is mounted.
When this method is used, the user need not consider the frame format of the
FINS command. Basically, the user executes the following.
1,2,3... 1. .Store the data in the command format of the FINS command to an I/O
memory area such as Data Memory. (S onwards: command data.)
2. Store the number of send data bytes or the addresses of the send destina-
tion to the I/O memory area such as Data Memory. (C to C+5: control data)
Note When the FINS command is issued to the Loop Controller mounted on the
local node, set the send destination network address to 00 Hex (local net-
work) and the send destination node address to 00 Hex (local node).
3. Specify S (first command word number), D (first response word number)
and C (first control data word) as the operands of the CMND (DELIVER
COMMAND) instruction, and execute the CMND instruction.
4. When the FINS response frame is returned from the Loop Controller, data
conforming to the response format is stored to the response address. The
response is then read when the Network Communications Enabled Flag
corresponding to the communications port number to be used turns ON.
5. For details, refer to items describing the CMND (DELIVER COMMAND) in-
struction in the Communications Commands Reference Manual (Cat. No.
W342) or the CS/CJ Series PLC Instructions Reference Manual (Cat. No.
W474).
CMND
S
D
C
CPU Unit Loop Controller
FINS command
Command data
Response data
Response
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