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4. Executes the CMCR instruction.
5. CMCR instruction execution is completed when bit 12801 is turned ON
while the Instruction Enabled Flag (bit 25204) is ON.
6. Turns ON if an error occurs during communications execution.
9-6
FINS Communications From Computers
Commands and responses sent from host computers must be in the formats
described in this subsection and must provide the proper FINS header informa-
tion. These formats can also be used to decode commands and responses
received from other network nodes.
9-6-1 Frame Format
With the FINS communications service, datagrams in the Ethernet frame format
shown below are sent and received.
FINS header
Command code
Text
Ethernet header
IP header
UDP header
FINS message
When a FINS command from a computer is used, the destination’s IP address
and UDP port number must be set.
9-6-2
FINS Command and Response Formats
This subsection explains the data formats for FINS commands and responses.
FINS Commands
Commands consist of a FINS header, command code, and text. The length and
content of the text depend on the particular command.
FINS header
Command code
Text (max. 1,998 bytes)
FINS Responses
A response block includes a response code (a 2-byte code in binary) added to
the command format. In the FINS header information, DNA DA1, and DA2 are
interchanged with SNA, SA1, and SA2 (in comparison to the command header)
and SID is the same as that in the command header.
FINS header
Command
code
Text (max. 1,998 bytes)
Response
code
An error response will be returned if the IP-FINS node address conversion table
is not correctly set.
FINS Communications From Computers
Section 9-6
Summary of Contents for SYSMAC C200HW-PCS01-EV1
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