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Appendix 2 Request Code Table
This table lists the request codes (CMD) used with SEND/RECV instructions sent to the Ethernet Port. Refer to the section/item indicated in the reference column in the table for detailed explanations of the request codes.
Table A.2 Instructions (Requests) to the Ethernet Port
Request | Function | Instruction | CMD/Class | Reference |
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Reset request | Resets the Ethernet Port. | SEND | 0011H/(1) | Section 4.3 |
Parameter setup request | Sets up the Ethernet Port parameters. | SEND | 0012H/(1) | Section 4.4 |
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Operating mode control | Sets the operating mode. | SEND | 0013H/(1) | Section 4.5 |
request |
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Remote port verification | Verifies the existence of another port on the | SEND | 0014H/(1) | Section 7.3 |
request | network. |
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RAS information readout | Reads out the Ethernet Port RAS information. | RECV | 0015H/(1) | Section 7.6 |
request |
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Time set request | Sets the Ethernet Port internal clock | SEND | 0018H/(1) | Section 7.5 |
| Time information for event trace |
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Register read request | Reads register data from remote T2N into registers | RECV | 0021H/(2) | Section 5.4 |
(PC link function) | in the local T2N. |
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Register write request | Writes register data from the local T2N to registers | SEND | 0021H/(2) | Section 5.3 |
(PC link function) | in remote T2N. |
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Remote port loopback | Performs a loopback test with another Ethernet | SEND | 000FH/(2) | Section 7.4 |
request | Port on the network. |
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UDP open request | Opens a UDP socket. | SEND | 0031H/(3) | Section 6.4 (1) |
UDP send request | Transmits data from an open UDP socket. | SEND | 0032H/(3) | Section 6.4 (2) |
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UDP receive request | Reads out data received by an open UDP socket. | RECV | 0033H/(3) | Section 6.4 (3) |
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UDP close request | Closes (terminates) an open UDP socket. | SEND | 0034H/(3) | Section 6.4 (4) |
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TCP open request | Opens a TCP socket. | SEND | 0035H/(3) | Section 6.4 (5) |
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TCP send request | Transmits data from an open TCP socket. | SEND | 0037H/(3) | Section 6.4 (6) |
TCP receive request | Reads out data received by an open TCP socket. | RECV | 0038H/(3) | Section 6.4 (7) |
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TCP close request | Closes (terminates) an open TCP socket. | SEND | 0039H/(3) | Section 6.4 (8) |
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∙The request code (CMD) types (1) to (3) have the following meanings.
Class (1) is module control, (2) is PC link protocol transmission, and (3) is socket interface transmission.
∙For a single Ethernet Port, it is not possible to request another class (1) CMD while a class
(1) CMD is executing. This is also true for class (2) CMDs. If such a request is issued, the status will be transmission port busy, and the request will go to the wait state.
∙For a single Ethernet Port, when requesting a class (3) CMD, it is not possible to request another class (3) command for a socket for which an instruction is executing. If such a request is issued, the status will be transmission port busy, and the request will go to the wait state.
∙There are eight sockets, and each can independently accept and execute a class (3) instruction.
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