PLC relays wont latch

Hood

PLC relays wont latch

« on: February 04, 2007, 02:18:28 PM »

Sorry for the lack of technical terms but I am trying to get to grips with a PLC and MODbus. Yesterday I seemed to be getting along great, had some output relays on the PLC that I could activate with M6 command etc but today I just cant get it to work. Sometimes when I command the output it will momentarily switch the PLC output but it just wont latch it. Anyone have any ideas?
Hood

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Hood

Re: PLC relays wont latch

« Reply #1 on: February 04, 2007, 03:40:44 PM »

Problem solved (I think) thanks to Brian.
Just one big problem left which will be harder to work out, its called Hood the idiot

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Chaoticone

5,624
Precision Chaos

Re: PLC relays wont latch

« Reply #2 on: February 04, 2007, 08:28:59 PM »

LOL................... Hood the Great.

Brett

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If you could see the things I have in my head, you would be laughing too.

My guard dog is not what you need to worry about!

Brian Barker

3,860

Re: PLC relays wont latch

« Reply #3 on: February 06, 2007, 04:46:59 PM »

Hood, you should post and tell everyone how you fixed the problem

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Hood

Re: PLC relays wont latch

« Reply #4 on: February 06, 2007, 06:24:41 PM »

I didnt fix it, it was a guy called Brian

Anyway what it was, being a total beginner at MODbus I thought I would have to use the Outputs in Ports and Pins so I had them set up to port 0 pin1 etc. After talking to this guy called Brian I found out that there is no need to set the ports and pins as Mach would talk over MODbus to the PLC and the setting of outputs would be handled by the VB.
I am planning on writing a few lines for the wiki once I learn a bit more about using a PLC. This will be from a total beginners perspective and wont be of any interest to most people but hopefully it will help people like me (total PLC/MODbus beginners) and point them in the right direction.
Hood

« Last Edit: February 06, 2007, 07:13:09 PM by Hood »

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Chaoticone

5,624
Precision Chaos

Re: PLC relays wont latch

« Reply #5 on: February 06, 2007, 06:42:23 PM »

That is good Hood, you are in the short rows now it sounds like.

That Brian character must be pretty sharp. Looking forward to the addition to the Wiki. Myself, unlike some of you, Hmm, Hmm need all the help I can get.

Brett

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If you could see the things I have in my head, you would be laughing too.

My guard dog is not what you need to worry about!

Brian Barker

3,860

Re: PLC relays wont latch

« Reply #6 on: February 07, 2007, 05:56:27 PM »

Sometimes you just get lucky and things work...

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xjdubber

25

Re: PLC relays wont latch

« Reply #7 on: February 12, 2007, 03:51:16 PM »

Quote from: Hood on February 06, 2007, 06:24:41 PM

I didnt fix it, it was a guy called Brian
Anyway what it was, being a total beginner at MODbus I thought I would have to use the Outputs in Ports and Pins so I had them set up to port 0 pin1 etc. After talking to this guy called Brian I found out that there is no need to set the ports and pins as Mach would talk over MODbus to the PLC and the setting of outputs would be handled by the VB.
I am planning on writing a few lines for the wiki once I learn a bit more about using a PLC. This will be from a total beginners perspective and wont be of any interest to most people but hopefully it will help people like me (total PLC/MODbus beginners) and point them in the right direction.
Hood

it ill be handy to me! look forward to seeing it!

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