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Showing results 1 to 25 of 233
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Search: Posts Made By: nwboson
Forum: LIVE PLC Questions And Answers February 1st, 2016, 07:20 PM
Replies: 10
Views: 673
Posted By nwboson
There's also the option of adding something like...

There's also the option of adding something like a Red Lion datastation to do your logging. Might be less expensive than buying AB hardware and writing software since logging on the Red Lion is so...
Forum: LIVE PLC Questions And Answers February 1st, 2016, 07:09 PM
Replies: 12
Views: 1,038
Posted By nwboson
I just write a little bit of test code between...

I just write a little bit of test code between the two PLCs to rattle a bit as fast as possible over the network. Then just measure (count) its frequency with a PLC counter. Many PLCs have multiple...
Forum: LIVE PLC Questions And Answers December 17th, 2014, 07:37 PM
Replies: 13
Views: 4,815
Posted By nwboson
You guys know better than me... Can't you get...

You guys know better than me...
Can't you get an RSLogix 500 Micrologix-only license for around $100 or so?

So if the dongle is also around $100, wouldn't the easiest choice just be to buy a...
Forum: LIVE PLC Questions And Answers December 17th, 2014, 07:16 PM
Replies: 8
Views: 1,554
Posted By nwboson
HOMER_BL, Thanks for the further...

HOMER_BL,

Thanks for the further explanation. You have an interesting and fun application there.

Here is the quote from the General Specifications and Features for the S7-1200 that bit me in...
Forum: LIVE PLC Questions And Answers December 16th, 2014, 07:18 PM
Replies: 5
Views: 1,574
Posted By nwboson
I'll take a stab - may be other reasons but first...

I'll take a stab - may be other reasons but first thing that comes to mind...

Have you made sure each MSG block is complete (check DN/ER) before calling the next MSG block? Are the MSG blocks...
Forum: LIVE PLC Questions And Answers December 16th, 2014, 06:56 PM
Replies: 8
Views: 1,554
Posted By nwboson
I implemented a similar scenario with 8 S7-1200...

I implemented a similar scenario with 8 S7-1200 PLCs and 3 Siemens large HMIs. Its a simpler version of your architecture, I think. No WinCC though. Worked great in the end (no collisions or...
Forum: LIVE PLC Questions And Answers November 10th, 2014, 03:59 PM
Replies: 6
Views: 1,257
Posted By nwboson
That 'what is used' looks suspicious to me: I...

That 'what is used' looks suspicious to me: I can't see where it waits for the final MSG to be completed before it starts again at the first MSG (or else I'm missing something). It looks to me like...
Forum: LIVE PLC Questions And Answers November 10th, 2014, 11:04 AM
Replies: 6
Views: 1,257
Posted By nwboson
Here's a really old post I did a few years ago...

Here's a really old post I did a few years ago with example 1400/Powerflex 4 modbus MSG code examples. In my opinion, programming the MSG instructions is a bit difficult to get correct - to avoid...
Forum: LIVE PLC Questions And Answers November 10th, 2014, 10:45 AM
Replies: 7
Views: 2,373
Posted By nwboson
Gmail smtp requires SSL or TLS - neither of which...

Gmail smtp requires SSL or TLS - neither of which is supported by Red Lion. So your email server needs to support plain non-secure SMTP. I've never been able to get gmail to work with the Red Lion....
Forum: LIVE PLC Questions And Answers October 11th, 2014, 12:20 PM
Replies: 4
Views: 1,397
Posted By nwboson
Looks like you could do all this with one...

Looks like you could do all this with one S7-1200. If all signals are physically close, I don't see any advantage to using multiple S7-1200 and one will make the programming much easier. If some of...
Forum: LIVE PLC Questions And Answers September 4th, 2014, 11:21 AM
Replies: 5
Views: 978
Posted By nwboson
I believe Red Lion adheres to the +-3V (minimum)...

I believe Red Lion adheres to the +-3V (minimum) RS-232 specification so the +-5V should be fine.

Since RS-232 is single-ended, are you hooking up the common (ground) pin between the sender (DSP)...
Forum: LIVE PLC Questions And Answers August 21st, 2014, 06:32 PM
Replies: 22
Views: 1,990
Posted By nwboson
Thanks for your input, Lancie1. I did get that...

Thanks for your input, Lancie1. I did get that the OP has successfully sold the optimal solution we would all usually prefer. However, since these threads do last forever, I thought a reply about...
Forum: LIVE PLC Questions And Answers August 21st, 2014, 04:08 PM
Replies: 22
Views: 1,990
Posted By nwboson
Consider using bifurcated relays for an...

Consider using bifurcated relays for an application like this. It will help ensure the accuracy of your 4-20 over time. We have thousands of these multiplexed I/O points installed and the...
Forum: LIVE PLC Questions And Answers August 21st, 2014, 03:51 PM
Replies: 3
Views: 1,132
Posted By nwboson
All memory cards have special registers defined...

All memory cards have special registers defined that describe the card capabilities. These registers are read-only: they cannot be modified. Most manufacturers rely on a standard set of registers,...
Forum: LIVE PLC Questions And Answers August 21st, 2014, 03:43 PM
Replies: 12
Views: 2,419
Posted By nwboson
I just finished my first project with a Micro...

I just finished my first project with a Micro 850. I used it as a test fixture for a panel that had a Micrologix 1400.

I regularly use Siemens and Allen Bradley PLCs as interchangeable so I'd...
Forum: LIVE PLC Questions And Answers August 10th, 2014, 11:34 AM
Replies: 11
Views: 2,396
Posted By nwboson
What happens if you assign the analog data to a...

What happens if you assign the analog data to a global variable and then watch the global variable?
Forum: LIVE PLC Questions And Answers August 9th, 2014, 09:29 AM
Replies: 11
Views: 2,396
Posted By nwboson
Could you provide more detail: Are your inputs...

Could you provide more detail:
Are your inputs voltage or current?
How do you have them wired to the IF4?
What do you have wired to the COM pins on the IF4?
How and what have you connected to the...
Forum: LIVE PLC Questions And Answers August 9th, 2014, 09:22 AM
Replies: 14
Views: 10,057
Posted By nwboson
Raspberry Pi was originally conceived as a very,...

Raspberry Pi was originally conceived as a very, very low cost device to allow students to learn computer architecture and computer programming. It has been immensely successful at introducing...
Forum: LIVE PLC Questions And Answers August 9th, 2014, 09:06 AM
Replies: 1
Views: 566
Posted By nwboson
No difference. The := assignment operator is...

No difference. The := assignment operator is there for compatibility with some really old Red Lion software: I never use it and only use the '=' assignment operator.
Forum: LIVE PLC Questions And Answers August 9th, 2014, 08:44 AM
Replies: 3
Views: 742
Posted By nwboson
If you perform the google search I mentioned...

If you perform the google search I mentioned earlier, you will find the Weintek document 'Siemens_S7_300_MPI.pdf'.

It explains you will set the station number of the first HMI to zero and the...
Forum: LIVE PLC Questions And Answers August 7th, 2014, 07:11 PM
Replies: 3
Views: 742
Posted By nwboson
Before you posted your question, did you try a...

Before you posted your question, did you try a search 'weintek siemens mpi' with google? Weintek has a PLC Connection Guide Document that seems to explain everything you may need.
Forum: LIVE PLC Questions And Answers August 1st, 2014, 10:26 AM
Replies: 13
Views: 1,122
Posted By nwboson
Man I'm feeling dense. So you have a G306...

Man I'm feeling dense. So you have a G306 connected to the SLC5/04 DF-1 port that you are trying to send the serial through to PC and RSLinx. But you also have the G306 connected to ??? port on the...
Forum: LIVE PLC Questions And Answers August 1st, 2014, 10:18 AM
Replies: 13
Views: 1,122
Posted By nwboson
Oh, I finally get it, The G306 is connected to...

Oh, I finally get it, The G306 is connected to the DF-1 port AND you are trying to get pass-through running simultaneously.

You are out of my league now. Sounds like okiepc has tried it to no...
Forum: LIVE PLC Questions And Answers August 1st, 2014, 10:04 AM
Replies: 13
Views: 1,122
Posted By nwboson
Sorry I'm not following 'display lose connection...

Sorry I'm not following 'display lose connection to plc'. I forgot to polish my crystal ball this morning:-) You have what kind of display hooked to what and how?
Forum: LIVE PLC Questions And Answers August 1st, 2014, 09:55 AM
Replies: 13
Views: 1,122
Posted By nwboson
I think you also need to short pins 1,6,7,8 on...

I think you also need to short pins 1,6,7,8 on the SLC side of the cable. I believe the SLC does HW serial handshaking so shorting those pins defeats (or should I say permanently enables?) the...
Showing results 1 to 25 of 233

 
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