Ron_S
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Everything posted by Ron_S
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If it is wired with 0V at the common terminals - then 24V will be the common for whatever the outputs are powering. When the output is off, the 24v will come back through the coil (giving a false 24V really) When the output is on it will now be 0v (or negative)
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D0 or DO? However, the outputs can be supplied on the common terminal with 0V and 24V can be the common for the relays/contactors in the panel. It's the practice in Japan and often Chinese machines. The S/S is just for input signals
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Show us how far you have got and we will gladly assist you. A tip: If timer = 1 then ?
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This is just information that might help someone in the future. I was called to a job where the above PLC had fault lights on. When I connected, there was no program inside.?? They had a back-up program so I downloaded it and all seemed OK. Then the error light started flashing again. Once again, the program was missing. Short version: They rushed out to buy a new one, I installed it, put the program in and they were back up and running with no issues. Later, in my office, I opened the PLC to see if there was anything obvious. There wasn't. If you have ever opened an FX plc - they are a marvel of micro electronics with virtually no replaceable parts. (obviously output relays and transistors but that was not the problem) I have lots of 2nd hand FX plc's so I swapped out the 1.0Fsupercapacitor from one. More in hope than anything else. That was the problem - it worked perfectly. A £3 supercapacitor fix.
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put more pin holes in the disk and recalibrate
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Does anyone else suffer from this strange anomaly? If I save a program using GX Works 2 onto my laptop hard drive - everything is fine and I can open it again at any time. If I save it to a USB memory stick, once again, I can reopen it with the laptop, no bother. But... If I then put the USB into my main PC, I immediately get an error that the USB is corrupt and needs repairing. If I 'repair it' the GX file will not open. If I ignore the repair message - I can open the program and everything is fine. I can save it to the PC hard drive or the USB. This is the same with any USB stick Same operating system (win 10) on both.
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Yes, it has to be part of the routine of connecting to a plc - check which com port is being used by the adapter
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I checked that and the list was missing too or filled with NOP's I couldn't clear the memory or anything.
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Has anyone else noticed that a lot of old FXnn plc's are starting to fail? By old, I think 20 - 25 years old. It's just that in the last 12 months, I have had to attend about 10 FX plc's with the red error light and unrecoverable programs. Only one FX (you know, one of those big square things) was a flat battery that had never been changed. The rest were battery-less models. That is, apart from one FX2n - but the battery was fully charged on that one. Not only was it impossible to recover the program - they would not accept a program or allow a fault diagnosis. Same fault across different industries. Maybe take it as a reminder to back-up aging FX models. They are coming to the end of their life cycle.
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No high temperatures or extremes of anything. A nice bedding company, a Printers, a cosmetic bottle-filling station and so on. Red error light flashing. I could get partial code out of some but with missing logic and yellow pages but none would allow programming or a new one to be downloaded. I even opened some PLC's to see if there was anything in common but they all looked perfect inside. I have one of them here on my desk - an FX1n 40mr. It looks brand new but even after a few weeks of sitting there it has the same fault and starts to communicate, then stops. I agree, 20 - 25 years is a good run but it's causing chaos with factories that don't back-up.a
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There is a link to the software on this page It's still active
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Need a simple 1 second pulsed output with button push
Ron_S replied to Soundman5535's topic in Mitsubishi
You'll have to explain more... Do you want a 1 second on, one second off output, when an input is on? Or.. an output on for just one second when an input is on. -
I mean you will get warnings that the versions do not match. Ignore it and upload anyway.
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I usually let sleeping dogs lie with version and firmware updates. If they were working perfectly before I came - they'll be the same versions when I have gone. Probably because I once 'bricked an E300 doing an unnecessary upgrade.
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You start at the beginning. Check your pc has a usb to serial port showing - and what com port number it is. If you do, open a blank E100 project and go to Transfer. select Recieve and set the Com port to the same number.
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Of course - it can be confusing but Tim has now said he understands the double coil rule. So I thought it fair that there are exceptions. :)
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Unless you have a HMI connected - I wouldn't bother. The Mitsubishi internal clock is next to useless. It can gain nearly an hour over 1 year Probably why the past engineer did it manually.
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You can actually double-coil in certain circumstances. If they are within an STL sequence. Even then though it's better to use M coils and a bit of that M coil to operate the Y output outside of the STL sequence.
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I am in the process of upgrading an E300 HMI to the E1000 range for a customer The old HMI keeps failing and going blank. I managed to get the old program out while it was working for a short while. A nice little job sat at my desk replicating the program. I came across this block
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This was a one-off Panic and I would never advocate it. I thought about the repercussions later on but at the time I was new in the game and couldn't take the hit. I never worked for them again and they are long gone. It just reminded me of that story with this project.
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Yep, The old E series HMI's are starting to fail regularly now. But some are very old in electronic terms and have been brilliant workhorses.
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Of course there are Inntele. Time bombs are a touchy subject - but I have done it only once in 30 years of programming. And that was because I was warned by another contractor that they were very bad at paying. He had been owed £18000 for over a year. I had been paid 50% before the job and the rest to be paid on completion (then I was warned by the contractor) I was upfront with the customer and told him the machine would stop in 2 weeks if I had not been paid - they assured me I would be paid (I wasn't, even though I phoned them a few times) It was amusing to me in a way because I set it for Friday morning and it would be triggered when the auto-stop button was first pushed. I expected a call around 09:30 after their 09:00 tea break but no call. Finally, at 11:00 they called. They were panicking as they had rush orders. I made them transfer the money to my bank and then told them how to take the trap off.
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A strange answer with no knowledge. The equipment was 25 or so years old and was never rented. They laughed when I told them about it I found it unusual and quite funny so posted it here
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An unreferenced block with a trigger of D502? Here's what was in it. (and I have edited it as it contained the rudest word)
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It means you don't have a coil for those 'bits. Nothing to worry about.
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