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Command Codes and Response Codes Section 7-3
7-3 Command Codes and Response Codes
7-3-1 Command Code List
The FL-net Unit supports and therefore automatically returns a response to
the command codes listed in the following table (FINS commands addressed
to the FL-net Unit).
Note The WORD BLOCK DATA READ/WRITE commands with an unspecified
node numbers are provided to ensure compatibility with applications created
with the CS1W-FLN01. Use the WORD BLOCK DATA READ/WRITE com-
mands with specified node numbers to create new applications.
7-3-2 Response Code List
Response codes are 2-byte codes that indicate the results of command exe-
cution. They are returned in the response following the command code.
The first byte of a response code is the MRES (main response code), which
categorizes the results of command execution. The second byte is the SRES
(sub-response code) which specifies the results.
The relationship between the MRES and the execution results are shown in
the table on the next page.
Command code Function name
MRC SRC
05 01 CONTROLLER DATA READ
06 01 CONTROLLER STATUS READ
08 01 INTERNODE ECHO TEST
21 02 ERROR LOG READ
29 01 TRANSPARENT MESSAGE FRAME SEND
02 TRANSPARENT MESSAGE RECEIVED FRAME READ
03 WORD BLOCK DATA READ (unspecified node number)
04 WORD BLOCK DATA WRITE (unspecified node number)
23 WORD BLOCK DATA READ (specified node number)
24 WORD BLOCK DATA WRITE (specified node number)
Command
code Response
code
MRC: Main request code
SRC: Sub-request code
MRES: Main response code
SRES: Sub-response code
MRC SRC MRES SRES