Guilherme Posted March 25, 2021 Report Share Posted March 25, 2021 Hi, Would someone help me with this fail? This occurs suddenly when the machine is running. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted March 25, 2021 MVP 2023 Report Share Posted March 25, 2021 Have you tried replacing the expansion cable? Quote Link to comment Share on other sites More sharing options...
Guilherme Posted March 25, 2021 Author Report Share Posted March 25, 2021 Not yet... This cable is a common ethernet cable ? Or need to replace for a orginal expansion cable ? Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted March 25, 2021 MVP 2023 Report Share Posted March 25, 2021 You must buy the cable from a Unitronics distributor. It looks like an Ethernet cable, but it's pinned differently and well-shielded. They have multiple lengths available - from 0.5m up to 20m. They're not very expensive, as I recall. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted March 25, 2021 MVP 2023 Report Share Posted March 25, 2021 I'm not saying that's the problem, but that's the first thing I'd check. Try wiggling the cable at both ends and along the length while the PLC is in operation to see if you can induce the problem. If not, then you might look for a source of electrical interference, such as a nearby VFD or other poorly shielded RF source. Do you also have a Snap-In module installed? Quote Link to comment Share on other sites More sharing options...
Guilherme Posted March 25, 2021 Author Report Share Posted March 25, 2021 No, I don't. It's necessary install this Module? Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted March 25, 2021 MVP 2023 Report Share Posted March 25, 2021 Just now, Guilherme said: It's necessary install this Module? No. There's two different types of I/O modules available - "Snap-In" modules and "Expansion" modules. Depending on your project requirements, you can have either or both. Sometimes the Snap-In modules can work lose and cause problems, so that is why I was asking. Quote Link to comment Share on other sites More sharing options...
Guilherme Posted May 10, 2021 Author Report Share Posted May 10, 2021 On 3/25/2021 at 3:59 PM, Flex727 said: No. There's two different types of I/O modules available - "Snap-In" modules and "Expansion" modules. Depending on your project requirements, you can have either or both. Sometimes the Snap-In modules can work lose and cause problems, so that is why I was asking. The project contain 3 IO modules Digital, and I already tested the expansion cable. But the fails still happening Quote Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted May 11, 2021 MVP 2023 Report Share Posted May 11, 2021 11 hours ago, Guilherme said: already tested the expansion cable Does this mean it is a correct one like Flex has said? Are the module interconnections all firmly seated. Is the Power supply correctly applied everywhere and of sufficient capacity? Set up logging of I/Os to see if the failure is attributable to the same one all the time, which would indicate a fault on that one. In your photo it does not show the RUN S.C. leds on the first module. Is the RUN green like the others? Quote Link to comment Share on other sites More sharing options...
TozoM8 Posted May 11, 2021 Report Share Posted May 11, 2021 I run into weird stuff like that when the battery is running low. It wouldn't hurt to check. Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted May 11, 2021 MVP 2023 Report Share Posted May 11, 2021 Quastions; 1 What expansion module used EX-A1X or EX-A2X? EX-A2X is isolated and more stable. 2 How much W is power supply capacity? If it low - install NEW another one with more A on 24VDC outputs 3 Is it possible that on output present relay or valve coils without diode clamp? If Yes - install diode clsmp to all coils 4 Is it some VFD installed near PLC - if Yes - please connect -24V power supply wire to machine GROUND (EARTH). 5 Is it possible that on some output present short circuit? And some times PLC activate this output and restart PLC with error? Quote Link to comment Share on other sites More sharing options...
leonardo Posted February 27, 2022 Report Share Posted February 27, 2022 I have same problem with a PLC 1040 that is working without problem for several years, could you tell me if you solve it? how could you solve it? Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted February 27, 2022 MVP 2023 Report Share Posted February 27, 2022 6 hours ago, leonardo said: I have same problem with a PLC 1040 that is working without problem for several years, could you tell me if you solve it? how could you solve it? Did you go through all the troubleshooting hints presented in this thread? Quote Link to comment Share on other sites More sharing options...
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