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Command Codes and Response Codes Section 7-1
7-1 Command Codes and Response Codes
7-1-1 Command Code List
The command codes listed in the following table can be sent to an Ethernet
Unit.
7-1-2 Response Code List
Response codes are 2-byte codes which indicate the results of command
execution. 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.
Command code Name Page
MRC SRC
04 03 RESET 159
05 01 CONTROLLER DATA READ 160
06 01 CONTROLLER STATUS READ 161
08 01 INTERNODE ECHO TEST 163
02 BROADCAST TEST RESULTS READ 164
03 BROADCAST DATA SEND 164
21 02 ERROR LOG READ 165
03 ERROR LOG CLEAR 166
27 01 UDP OPEN REQUEST 167
02 UDP RECEIVE REQUEST 168
03 UDP SEND REQUEST 169
04 UDP CLOSE REQUEST 171
10 PASSIVE TCP OPEN REQUEST 172
11 ACTIVE TCP OPEN REQUEST 174
12 TCP RECEIVE REQUEST 177
13 TCP SEND REQUEST 178
14 TCP CLOSE REQUEST 180
20 PING 181
30 FINS/TCP CONNECTION REMOTE
NODE CHANGE REQUEST
182
31 FINS/TCP CONNECTION STATUS
READ
183
50 IP ADDRESS TABLE WRITE 184
57 IP ADDRESS WRITE (CJ Series only) 185
60 IP ADDRESS TABLE READ 186
61 IP ROUTER TABLE READ 187
62 PROTOCOL STATUS READ 189
63 MEMORY STATUS READ 193
64 SOCKET STATUS READ 195
65 ADDRESS INFORMATION READ 196
67 IP ADDRESS READ 197
Command
code
Response
code
MRC: Main request code
SRC: Sub-request code
MRES: Main response code
SRES: Sub-response code
MRC SRC MRES SRES
