Posted 14 Apr 2016 Hi , I started my plc about 5 years ago for plastic unit but now When I turn them on, the correct screens appear on the HMI terminal, but no data is coming through from the PLC. After a few seconds, a pop-up appears sayingPLC No Response 00-00-0". Does anyone know the meaning of this message.Then I am on and off several times so that the device is turned on and working properly. I DON'T KNOW ? Share this post Link to post Share on other sites
Posted 14 Apr 2016 Is it connected by ethernet or serial port? PLC/HMI Manufacturer? Model no? Share this post Link to post Share on other sites
Posted 15 Apr 2016 Hi . thanks for your attention , PLC = MITSUBISHI MELSEC FX2n-48MR Interface between PLC & HMI = SERIAL PORT Share this post Link to post Share on other sites
Posted 15 Apr 2016 Did anyone make any changes to the PLC or HMI settings recently? Or write any program data to them? Is the serial cable securely plugged in and not damaged anywhere? Share this post Link to post Share on other sites
Posted 15 Apr 2016 19 hours ago, Luke.S said: Is it connected by ethernet or serial port? PLC/HMI Manufacturer? Model no? Cable appears healthy and so far have not made changes to the program.It may be because back up battery ? So far we have not replaced . Thank you Share this post Link to post Share on other sites
Posted 15 Apr 2016 The battery is ok as some outputs are coming on, therefore the PLC has retained it's programme. Don't ignore the obvious .... pull the communication plugs at the HMI and the PLC, squirt a small amount of contact cleaner into them and plug them in again. Amazing how often some contact cleaner this will cure serial communications problems. 1 person likes this Share this post Link to post Share on other sites
Posted 15 Apr 2016 thank you very mush colin , I'm testing it to see what happens Share this post Link to post Share on other sites
