Bryll Posted July 20, 2014 Report Posted July 20, 2014 What does this error code 3821 mean (attached picture) ? Gx IEC Dev. 7.04 FX3U-16MT/DSS with FX3U-ENET P502, FX3U-485BD and FX3U-485ADP. Communication is up and running correctly on the two RS-485 lines, and the Modbus TCP line. Can't find any information about the error code. link_error.bmp Quote
Bryll Posted July 27, 2014 Author Report Posted July 27, 2014 Recompiled and downloaded the code and the error code appears at once. So it's nothing that pops up after a while. Anyone out there that has a clue ? Quote
pigflying Posted July 29, 2014 Report Posted July 29, 2014 hello pls see the documen(FX3U-MODBUS_ Manual.pdf), maybe you can find the answer. 3821-representing Modbus Error on ch2 Quote
Bryll Posted July 29, 2014 Author Report Posted July 29, 2014 Don't know how I could have missed that, been looking in that manual several times. Thanks for pointing me in the right direction The strange thing is that the Modbus slave communication I have on channel 2 is up and running. Quote
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