Nikola Gramatikov Posted January 28, 2022 Report Share Posted January 28, 2022 Hello, I have problem with Can Bus communication between V1210 and EX-RC1 The system is working from 6years in one moment the EX-RC1 - Buss comm indicator starts blinking in green. We make following: - Change the module EX-RC1 with new one - Cheack wiring and termination resistor - it's OK - Traying different cable - the same issue - Update bothe PLC and EX-RC1 - firmware, boot, os and etc. - Check communication with software on Connection module / Network of Visi Logic - V1210 - is green after test ot address 1 - EX-RC1 - is green after test ot address 2 Addres 2 on EX-RC1 is hardware adjusted by jumpers The strange is that this is working system without changes from years..... Please help.... Quote Link to comment Share on other sites More sharing options...
MVP 2021 kratmel Posted January 28, 2022 MVP 2021 Report Share Posted January 28, 2022 Is it +24V and GND wire connected and powered on V1210 and EX-RC1 CAN bus power terminal (5pin green connector)? Quote Link to comment Share on other sites More sharing options...
Nikola Gramatikov Posted January 28, 2022 Author Report Share Posted January 28, 2022 Yes everything is connected, bus power on terminal 1 and 5, canbus on 2 and 4 and termination resistor on 2 and 4, PE on pin 3 Quote Link to comment Share on other sites More sharing options...
MVP 2021 kratmel Posted January 28, 2022 MVP 2021 Report Share Posted January 28, 2022 Since you replaced the EX-RC1 module, checked the conductors (by replacing), the power supply of the CAN modules, remains the only culprit - the PLC itself. I do not recommend anyone to repair the PLC - but you are probably convinced that the CAN transmitter in PLC is probably faulty. You can hire an electronics specialist to test the internal CAN module on the PLC's internal board. There is a well-known chip 78M05 - linear power converter + 5V and CAN driver 82c250 on the PLC motherboard reverse side. Due to the fact that the system worked for a long time without any problems, I think that the 78M05 chip failed. P.S. However, I recommend - once again check the correctness of the power connection (not reverse polarity) and the correct connection of the СAN bus wires. Sometimes the system stops working after someone else's intervention, which is unknown. And we have to look for a problem in places where there are no mistakes. 1 Quote Link to comment Share on other sites More sharing options...
MVP 2021 Ausman Posted January 29, 2022 MVP 2021 Report Share Posted January 29, 2022 Further to all that Kratmel has said, which is likely correct, ensure that everything connected to the RC1 is OK. Test what happens if you disconnect all modules and all power perhaps shared at that end and see what happens. Kratmel's statement 13 hours ago, kratmel said: Sometimes the system stops working after someone else's intervention, is so true! One can often get to a site and find an alteration, new high voltage gizmo fitted nearby, unclamped extra solenoids etc fitted. The list is endless! cheers, Aus 1 Quote Link to comment Share on other sites More sharing options...
Nikola Gramatikov Posted January 30, 2022 Author Report Share Posted January 30, 2022 Kratmel, thank you for the advice. I will try to ckeck this chips.... because PLC at all is Ok and only thi is the probelm now.... I double ckeck the wiring traying with 3 different cables it's not this... Quote Link to comment Share on other sites More sharing options...
AlexUT Posted January 30, 2022 Report Share Posted January 30, 2022 Nicola, You may check for short circuit between 0V and H, 0V and L, H and L on CANBUS connector. Resistance should be tens of kilobytes. *Disconnect cable before you make measyrement. For example, resistance between H and L is near 36 kB for V570, V1xxx. Low resistance or shortcut point to hardware problem. 1 Quote Link to comment Share on other sites More sharing options...
Nikola Gramatikov Posted January 31, 2022 Author Report Share Posted January 31, 2022 Thanks gays. I tray to measure moule and PLC - everything with resistance is OK. I'm giving it to electronic gay to test the chips 🙂 I test te expansion modul with V700 and it works 🙂 1 Quote Link to comment Share on other sites More sharing options...
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