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Appendix B Socket Service
Command Table
The following table lists the socket service commands used with USEND_T/URCV_T
instructions sent to the EN311. Refer to the section/item indicated in the reference
column in the table for detailed explanations of the request codes.
Table B-1 Request Codes to the EN311
Command/Code Function Instruction Class Reference
Reset request/16#0311 Resets the module. USEND_T (1) Section 4.3
Parameter setup
request/16#0312
Sets up the EN311 parameters. USEND_T (1) Section 4.4
Operating mode control
request/16#0313
Sets the operating mode. USEND_T (1) Section 4.5
Remote station
verification request/
16#0314
Verifies the existence of
another node on the network.
USEND_T (1) Section 7.3
RAS information
readout request/
16#0315
Reads out the module RAS
information.
URCV_T (1) Section 7.5
Time set request/
16#0318
Sets the module internal clock
Time information for event trace
USEND_T (1) Section 7.4
Register read request
(PC link function)/
16#0321
Reads register data from
remote station into registers in
the local station.
URCV_T (2) Section 5.4
Register write request
(PC link function)/
16#0321
Writes register data from the
local station to registers in
remote station.
USEND_T (2) Section 5.3
UDP open request/
16#0331
Opens a UDP socket. USEND_T (3) Section 6.4.1
UDP send request/
16#0332
Transmits data from a UDP
socket.
USEND_T (3) Section 6.4.2
UDP receive request/
16#0333
Reads out data received by a
UDP socket.
URCV_T (3) Section 6.4.3
UDP close request/
16#0334
Closes (terminates) a UDP
socket.
USEND_T (3) Section 6.4.4
TCP open request/
16#0335
Opens a TCP socket. USEND_T (3) Section 6.4.5
TCP send request/
16#0337
Transmits data from a TCP
socket.
USEND_T (3) Section 6.4.6
TCP receive request/
16#0338
Reads out data received by a
TCP socket.
URCV_T (3) Section 6.4.7
TCP close request/
16#0339
Closes (terminates) a TCP
socket.
USEND_T (3) Section 6.4.8
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