157
Socket Applications Section 7-2
The MRES codes are shown in the following table along with the results they
indicate. Refer to 8-5 Troubleshooting with Response Codes for details on
response codes including the SRES.
7-2 Socket Applications
The format of the following FINS commands partially differs when the sockets
are used.
7-2-1 Format
The basic format of these commands is shown in the diagram below.
Command Code Specifies the requested process.
Socket Option For the TCP OPEN REQUEST (ACTIVE or PASSIVE), specifies whether or
not the keep-alive function is to be used. For all other commands it is dis-
abled. (Set to 0).
Socket Number Specifies the socket number for which the process is requested, from 1 to 8.
Results Storage Area Specifies the area to store the results of the requested process.
MRES Execution results
00 Normal completion
01 Local node error
02 Remote node error
03 Unit error (controller error)
04 Service not supported
05 Routing error
10 Command format error
11 Parameter error
22 Status error
23 Operating environment error
25 Unit error
Command code Name Page
MRC SRC
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
Command
code
0123456789101112
Socket option
Socket number
Results storage area Parameters
Number of bytes from
the beginning of the frame
