Posted 28 Jul 2016 (edited) Hai, I have downloaded the program into the PLC, downloaded the program into the HMI VIA ethernet.When I turn on the HMI it's showing "PLC RESPONSE ERROR". I can write command to plc through HMI, But I can't read the signal from PLC, Does anyone know the meaning of this message or what I might be doing wrong or missing out?...CPU used:CP1L-EM40DT1-D, HMI used :NB7W-TW01B...PLC to HMI communication via ethernet... Edited 29 Jul 2016 by Santhosh Share this post Link to post Share on other sites