Tim!! Wish I had discovered you 2 years ago. Older electrician here working to catch up. You rock!
@TimWilborne Жыл бұрын
That is great to hear Richard! Keep it up!
@ayushgairola55704 жыл бұрын
you're doing great job guys, thanks for the stuff!
@TimWilborne4 жыл бұрын
You are welcome! Thanks for watching :)
@dougmahoney58722 жыл бұрын
Hi Tim! Good Video. You really to show how the program scan basically work. Like the program scans right to left top to bottom and cannot go back. This would be a general case. May help some beginning programmers…
@dwaynes59832 жыл бұрын
I just got off the phone last week helping a customer troubleshoot. After the run was finished the pumps and conveyor kept running. No body knew what the problem was. I found out the customer left the conveyor in Hand mode and confusing the plc program. All fixed now.
@danieljoun2193 жыл бұрын
Thanks Tim! Great video
@TimWilborne3 жыл бұрын
You are welcome Daniel!
@6ordon65 жыл бұрын
Good stuff Tim.
@TimWilborne5 жыл бұрын
Thanks. It was a tough one to keep the enthusiasm going in but very important content.
@efrenpinedo9343 Жыл бұрын
How does the watchdog timer work within the plc scan cycle?
@TimWilborne Жыл бұрын
If any PLC scan time is greater than the watchdog, the PLC will fault.
@awaismunir6340 Жыл бұрын
Hello @Tim Just wanted to ask if PLC updates output data table as it is executing program and then update outputs at the end of program or it just does it at the end once it has finished executing the program. If it does so at the end then where does it stores its ouput values during the execution of program?
@TimWilborne Жыл бұрын
The data table is updated immediately when something in the ladder writes to it. The physical outputs are updated at the end of the PLC scan in the Micrologix and SLC 500. Controllogix and Compactlogix don't work this way.
@slipnorris58824 жыл бұрын
Hi beginner here. The output module has a 1 in the bit box. The reason is because there is current going to the input module to the output module or the 1 is already programmed into the processor by the software?
@TimWilborne4 жыл бұрын
Not sure in following you but the input but box is in no way associated with the output bit box. You would to need to see what is putting a 1 into the output bit box.
@slipnorris58824 жыл бұрын
@@TimWilborne thanks for the reply, I just read a plc book , it threw me off, after watching videos on youtube, I have a better understanding.
@TimWilborne4 жыл бұрын
@@slipnorris5882 Glad they helped!
@stanleypolanco48874 жыл бұрын
Regards Tim A question? I have an SLC 5/03 with a shelf of 10 slots The program that has been loaded into the PLC consists of 8 LADs included (SYS 0 and SYS 1). The problem is that at the time of running the program, it only runs until LAD 5 and LAD 6 and 7 DO NOT WORK. What do you think it is? Thank you
@TimWilborne4 жыл бұрын
Hi Stanley. By default only Ladder 3 will be scanned. It sounds like you have JSR instructions for LAD 5, 6, and 7. There are other ways to call programs, it could be that ladder 4 and 8 are connected to some type of high speed interrupt.
@user-wt9xo5ys1m4 жыл бұрын
Hey Tim, Thanks for your the great video! I am new on PLC stuff, how can I show the logic on the HMI if I get into the system as administrator? many thanks
@TimWilborne4 жыл бұрын
Glad you like our video. We have a basic HMI series coming soon.
@user-wt9xo5ys1m4 жыл бұрын
@@TimWilborne can you send me your email address I want to message you with pictures on some problems I got in the field you might help me with that.
@et.sachin3 жыл бұрын
Do we need to keep an order while breaking down a program into multiple subroutines using JSR ? Like should i scan certain subroutine before another, does the order matter?
@TimWilborne3 жыл бұрын
The order of the JSRs will affect the way the program is scanned. I would say in 80% of programs, the order is insignificant, but in that 20 percent, it can affect the outcome on the machine.
@iliapopovich3 жыл бұрын
Hi, Mr. Tim, I'm wondering if it's possible to disable scanning if you want to program for training just with relay logic, I mean without the need for OSR function. I know that you're an expert in it, so that's why I'm asking someone like you. Thanks.
@TimWilborne3 жыл бұрын
Yes, absolutely
@iliapopovich3 жыл бұрын
@@TimWilborne Thanks for the answer. I understand you're joking, but for example, the first scan reset doesn't work obviously. So actually I need to disable any machine scans during the process.
@ryanconnigrizzard16474 жыл бұрын
Hey Tim, Amber. Im having a problem with my AB micro 1200 plc's. I notice that they are starting to go into "watchdog timeout fault". I can clear them but they come back. First time i clear them it would work for a week. Second time it would work for a day or two. Now after about 8 clears it faults within an hour. Any ideas on fixing this?
@TimWilborne4 жыл бұрын
What that means is that your PLC scan is occasionally too long. This could be caused by a very long program or excessive program loops using JSRs. While online, click on the S2 data file and you can see what the current scan time is, the maximum, and what the watchdog is currently set at.
@ryanconnigrizzard16474 жыл бұрын
@@TimWilborne thank you, ill try that. Program is very short. 1 analog device only.
@TimWilborne4 жыл бұрын
@@ryanconnigrizzard1647 Email it to me and I'll have a look.
@TarlKuhn5 жыл бұрын
Hey Tim, thanks for the video! Great stuff as usual, seems identical to the last video? Did I miss something?
@TimWilborne5 жыл бұрын
No I had messed up so had to make a small tweak and put it back up