PLC Faults in RsLogix 500 Micrologix and SLC. Is the Fault Light Flashing or Solid LED?

[@safiuddinsyed321]

Hi Tim, I have a SLC 500 PLC that is giving me an error with Slot 10 of Rack 2. I cleared the fault but I/Os are still faulted. Later, I went into power supply and it indicates an Overload power supply on Rack 1 error. I have 1746-P2 connected but the rack 1 indicates 1746-P1/P7 which is incorrect, do I need to change power supply type on the program? If so how do I do it?

[@codybristow13]

Hey I was wondering if you could help me I’m getting a rack data error and it’s telling me to check slot 2 i’ve backed up the programTurned off the power and made sure the card wasn’t loose then I also checked the contacts in the back everything seemed to look good but I can’t get the ball to clear it’s an old slick 500 series A 1746-A2 and my card is an input /output card

[@TimWilborne]

Have you changed out the module in question? That would probably be the first thing I would try.

[@codybristow13]

Tim Wilborne The problem is we don’t have one to replace it and it’s not manufactured anymore so what I ended up trying to do was going into I/O configurationsAnd switched the card from slot two the slot one And the problem followed now it’s telling me the errors in slot 1 so I know it’s the card but the company won’t get one but I found a spare PLC I’m just going to move around the inputs and outputs on it and adjust the program to make it work on that PLC

[@TimWilborne]

@@codybristow13 This is probably going to be solved by swapping parts but since it moved, my next guess would be the chassis or power supply.

[@saimmehmood6850]

I am using micrologix 1400 Series C and on startup of PLC fault light is continue to blink. the fault code i found is 2h. what is the solution??? please guide.

[@saimmehmood6850]

Fault 002h Unexpected hardware watchdog timeout or an ASIC reset occurred.

[@TimWilborne]

Hi Saim. This is a very common error code when you have grounding problems.

[@saimmehmood6850]

@@TimWilborne Thanks for your reply. I have properly ground the PLC, checked the battery voltages which are also fine. but fault is still there. what else i can do???

[@TimWilborne]

@@saimmehmood6850 Not just the PLC ground but other equipment grounds on the machine. It is almost always caused by this. You could also try some surge suppression on the power to the Micrologix 1400 but this will just hide the root problem.

[@saimmehmood6850]

@@TimWilborne i have disconnected all the other components from PLC and remove the PLC from panel now I am checking it on my table without any components attached. Connecting 24VDC to its power terminals and ground to its ground. For removing the doubts i have also changed the power supply.

[@samantharenteria9236]

Hello Tim , We have a solid fault light on how do o know what program i have to

[@TimWilborne]

Depends on the model of PLC

[@antoniojesus0803]

@@TimWilborne Please, mine is a MicroLogix 1500, it´s FAULT Led on Solid Red . What can I do to recovery it, please?

[@antoniojesus0803]

@@TimWilborne I saw at 0:29" that you talked about Solid Red Fault, it´s my situation, and It´s not connectying anymore... You do nor recommend to "Cycle Power", but I dont have other option from now on; Please, how can I do this "Cycle Power", please? Do you mean "turn Off and turn On", please?

[@cuthbertchaibva8361]

hello Tim thanks for your tutorials they are really helpful, but im having a problem with slc 5/03 sereis cpu run,force,and rs232 leds and batt led is blinking red, dh485 is solid green, im failing to pick the plc on the computer please help me out

[@ManpreetSingh-qi5cx]

Hi Tim, the Video is very helpful. I need your help, I have a problem with the micro logix 1400. If we run the machine above 70 speed then the conveyor stops and the PLC error comes. But below 70 speed doesn't have any issues. Note- Fault code is 0022h After clear the code PLC comes to run mode but once we increase the machine speed above 70mtr/ min. Then comes back to faulted mode. Fault light is flashing. Please can you guide me what to do?

[@ManpreetSingh-qi5cx]

I found a goto error; Major error halt & Math overview trap bit comes to 1.

[@TimWilborne]

That means a number is going over the maximum range. It is likely in your rate calculation.

[@marshal7102]

I have a ML1000BWA and it was working fine untill I had a Cheap USB adapter short out and kill my laptop while connected to my ML1000BWA. Sparks came from my USB port and the ML1000 instantly went into a red flashing LED. So I purchased a OEM USB cable adapter hoping there was no damage to my PLC. Connecting to the ML100BWA via the new cable and new laptop, I cannot establish communication with the PLC in order to clear the error. No comms are established even when using auto config. Just a steady flashing LED, So this unit is fried?

[@TimWilborne]

Probably start by hitting the basics in this lesson. I could be a com port issue. twcontrols.com/lessons/rslogix-500-training-configuring-rslinx-serial-df1-rs-232-driver-to-communicate

[@marshal7102]

@@TimWilborne Took the unit apart just to confirm and found a burned out component next to the communication port. Definitely the issue. I already ordered another one any way.

[@valentinebright8804]

Hello Tim. Trust you're doing great. I saw your very helpful video on how to hardreset SLC processors. I've got one stubborn one on my desk. It's new. And the flt led has been flashing. ITS NOT COMMUNICATING VIA SERIAL SO I CANT GET TO SEE WHAT THE FLT REPRESENTS. It's a Slc5/04 processor. I have hardreset countless times taking off memory module and batt and doing other sorts of combination. But it's still flashing red AND NOT STIKK COMMUNICATING . Please any help on this will be greatly appreciated. Thanks a lot

[@TimWilborne]

Let's hit the basics. What cable are you using and are you sure you have your communications setup correctly? Here is a link to help. www.theautomationstore.com/rslogix-500-training-configuring-rslinx-serial-df1-rs-232-driver-to-communicate/

[@wandsonmarques9741]

How i open file .dat the paste datlog?pleased help?The Factory Talck.

[@TimWilborne]

Hi Wandson. I'm not sure what you mean. Where did the DAT file come from?

[@Cinanerohan]

This ic chrao fron India, sir now i am programming AB1200 plc , after downloading when run mode selected plc is going to stop, communication is on.In fault display coming as Major error Halts:1/13=1 in error description display is coming as This is a user defined fault code. Kindly help me out.Thanks with regards.

[@TimWilborne]

Sounds like something is setting S:1/9 in your program. Do a cross reference on it. You can also find details the error number in S:6

[@مصطفىالربيعي-ت8غ]

Hey Tim, as usual very useful videos, my PLC got an issue which is the run light off but OK light is on and the Output module is off now, there is no fault led, any idea?

[@TimWilborne]

Yes your PLC is in program mode.

[@مصطفىالربيعي-ت8غ]

@@TimWilborne Cheers Tim for your quick answer.

[@TimWilborne]

@@مصطفىالربيعي-ت8غ Glad I could help.

[@gabrieleonnis9199]

Hy guys I have a problem with the plc the SD card led in solid Red ,any suggestion?thanks

[@TimWilborne]

Hi Gabriele. What type of PLC are you working with? The Micrologix and SLC PLCs do not have SD cards.

[@ManuelMartinez-fx6ql]

Hi Tim how are you? I need your help, I have a problem with the RSLogix 500 software. When I try to open the app this give me an error that says: Fatal error! The copy protection license for the application could not be acquired. Error: 2. Have you any idea of this error? Can you give a solution because I need to use the software? Thanks Tim!!

[@TimWilborne]

It means that your software is not activating properly. You'll need to reach out to Rockwell Support for that one.

[@arunlukose269]

hi tim. what if the PLC has reached 20 years?

[@TimWilborne]

20 years isn't an unusual life cycle for a PLC. You still troubleshoot it the same, see if the fault light is solid or flashing.

[@MrWaalkman]

Excellent advice! I think that the last time that I saw a Logix5000 fault was when a guy programmed his routine to access an array of pairs and he had n elements in the array and tried to access n+1. Blamo! (took down the paint line).

[@TimWilborne]

I'll let you know when I upload it.

[@vorapobautomation9760]

How to autoclear fault when power on SLC5/05 L553 CPU ?

[@TimWilborne]

I don't recommend auto clearing faults because you shouldn't be getting a fault in normal situations. Is there are particular fault that keeps popping up?

[@vorapobautomation9760]

@@TimWilborne every time when power off and on.

[@TimWilborne]

@@vorapobautomation9760 What is the fault code?

[@vorapobautomation9760]

@@TimWilborne Sorry I forgot it Thank you.

[@TimWilborne]

@@vorapobautomation9760 Note it the next time you have to reset it. It would be safer to resolve the problem that the power cycle is causing than simply resetting it.

[@timer51309]

I upload the faulted program to another folder so I can refer to it later. The first time I reset a PLC I did not write down the fault. My boss did not let me forget about that late night.

[@TimWilborne]

Yes we've all done it at one time or another. I tell people that no matter how rushed you are and how many people are standing around, treat it like a crime scene and collect evidence. If you don't found the root cause then it'll happen again. Thanks for watching!

[@vasupedapudi3781]

Help please

[@TimWilborne]

That model doesn't look familiar. What is it?

[@vasupedapudi3781]

@@TimWilborne it is messung nexgen 4000 i searched internet and could find nothing about that PLC except manual

[@TimWilborne]

I've never worked with them, good luck!

[@vasupedapudi3781]

@@TimWilborne ok thanq.

[@iliapopovich]

thanks, keep going

[@TimWilborne]

You are welcome