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Dear Jean Claude, As you said, you send FC03 requests to get the DI status of CIE-H10. Refer to page 18 of Modbus/TCP document https://www.eztcp.com/en/download/pds_files/an_modbus_tcp_en.pdf, the request frame for FC03 should include: Function code (1byte) \| Starting address (2 bytes) \| Quantity of Register (2 bytes) So normally, the request data may look like: 03 00 08 00 01 We don'st see this function code (0x03) in your request frame, so first please check your request data. You can use Wireshark to monitor your Modbus/TCP data. In case there is still a problem, we can establish a TeamViewer session. You can set up a schedule and send your credentials (ID and password) to us via email support@eztcp.com. Our working time is from 9:00 to 18:00 in UTC+9 Time zone. Thank you for your understanding. Best Regards > goldak wrote: > ------------------------------------ > hi > > i have tested of course the led of di0 is on > > i send a request 000006120008 > > i have a response > > 0 0 0 0 0 4 1 2 1 0 > > > the #9 is allways 0 > > > i have tried with fc04 request > > i have a response 4 but the digit #10 is allways 0 > > > if you want we can use teamwiever > > thank you to help me > > > Sollae Systems wrote: > > ------------------------------------ > > Dear Jean Claude, > > > > Please note that if the DI ports status is not changed, then the results should be the same. > > So for testing, you should manually change the input value of DI ports while making FC03 requests. > > > > In case the DI ports status is changed and CIE-H10'ss responses are still the same, could you please let us know more detail how did you send FC03 requests. > > For further analysis, please also provide us the Wireshark log while you are making FC03 requests. > > > > Thank you very much. > > Best Regards > > > > > > > goldak wrote: > > > ------------------------------------ > > > hi > > > > > > i am back from holydays > > > > > > thank you for the documentation of modbus > > > > > > i make some request (fc03) to have the in status > > > > > > the cieh10 send me allway the same > > > > > > please help me > > > > > > the version is 2.0 rev A > > > > > > thank you jean claude
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