FujiFilm NA0LA-ET1 User Manual page 43

Software Section
<Details of transmission data>
1) TCP/IP header part
In the case of a request command, this part is added at the top of the transmission data part of a loader command on the
personal computer side before the command is sent. In the case of a response command, this part is added at the top of
the transmission data part by the CPU unit before the response data is returned. Usually, the Ethernet communication driver
automatically adds this part, therefore, the user do not need to pay attention to this.
2) DP (Destination Port)
For request (PC to PLC)
Destination port No. on the destination module (not TCP/IP port No.). This is specified by the requester and fixed to FBh.
* In response data, DP and SP are swapped.
For response (PLC to PC)
The same DP as the one sent by the sender is returned.
3) SP (Source Port)
Requester port No. on the source module (not TCP/IP port No.). This No. is specified by the requester and fixed to 128 (80h).
For request (PC to PLC)
Fixed to 80h.
* In response data, DP and SP are swapped.
For response (PLC to PC)
SP is any number from 80 to 87h. (The PLC automatically determines an arbitrary No.)
4) Transaction
Specify Yes/No of transaction, Request/Response, and Transaction ID.
Yes/No of transaction must be set by the requester (PC). Transaction ID must be dynamically assigned on the PC side when a
request is issued. The response bit is set by the unit when a response is returned.
* The requester (PC) must set the transaction ID and also perform transaction ID collation of response data.
7
5) Transmission status
This data indicates the result of the transmission on the network.
* Fixed to 00h when a request is issued.
* In a response command, a value other than 00h means abnormal end. The meaning of individual codes is the same as
"operation status".
0
Yes/No of transaction (0: No, 1: Yes)
Request/Response (0: Request, 1: Response)
Transaction ID (0 to 63)
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