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Search: Posts Made By: James Mcquade
Forum: LIVE PLC Questions And Answers Yesterday, 03:58 PM
Replies: 6
Views: 127
Posted By James Mcquade
When you use logix 500 software, you can address...

When you use logix 500 software, you can address timers, counters, and others in two ways.

symbol descriptions and tag descriptions.
i use the symbol descriptions to identify the device and cad...
Forum: LIVE PLC Questions And Answers August 15th, 2018, 08:54 AM
Replies: 2
Views: 61
Posted By James Mcquade
question for you, what is a 4-20 ma loop? what...

question for you, what is a 4-20 ma loop?
what you propose is adding an additional resistor in the loop and will make your results invalid.

you should loop for a 4-20ma signal splitter.
if I am...
Forum: LIVE PLC Questions And Answers August 10th, 2018, 04:29 PM
Replies: 6
Views: 258
Posted By James Mcquade
look up nfpa 79, electrical standard for...

look up nfpa 79, electrical standard for industrial machinery, and nec 70 - electrical code book, nfpa 70e - arc flash.

there are others, but I don't know your system.

things designed for 50 hz...
Forum: LIVE PLC Questions And Answers August 10th, 2018, 04:21 PM
Replies: 9
Views: 430
Posted By James Mcquade
First !! you must nail down what you want ! ...

First !!
you must nail down what you want !
dot every I and cross every t, and no i'm not joking!

second, you must be good in math and have a plc that can do the math.

Kiesler makes an...
Forum: LIVE PLC Questions And Answers August 8th, 2018, 07:26 PM
Replies: 21
Views: 1,035
Posted By James Mcquade
I used to work for a UK company with a division...

I used to work for a UK company with a division in Tennessee.
they detailed every enclosure and junction box.

I've had customers request that kind of detail, most don't care.
just give them a...
Forum: LIVE PLC Questions And Answers August 1st, 2018, 01:58 PM
Replies: 1
Views: 124
Posted By James Mcquade
when logix 5000 first came out, you had to have...

when logix 5000 first came out, you had to have an additional battery for the cpu and memory module(I think) for holding the comments memory in tact.

you should check with your distributor to see...
Forum: LIVE PLC Questions And Answers July 27th, 2018, 01:13 PM
Replies: 12
Views: 470
Posted By James Mcquade
Since you have that many micrologix 1400 in...

Since you have that many micrologix 1400 in stock, I would stick with it.
you already have the spares and know the programming language.

regards,
james
Forum: LIVE PLC Questions And Answers July 27th, 2018, 01:09 PM
Replies: 10
Views: 564
Posted By James Mcquade
I just thought of this. I copied programs...

I just thought of this.

I copied programs from one system to the other (identical systems on the same machine) and had the same issue.

turns out I forgot to confirm the I/o addresses and failed...
Forum: LIVE PLC Questions And Answers July 27th, 2018, 09:23 AM
Replies: 10
Views: 564
Posted By James Mcquade
I always put a power on and stable logic into the...

I always put a power on and stable logic into the program.
when the system power up, have a 1 second timer to ensure power is ok before continuing to the remainder of the program.
I have had to do...
Forum: LIVE PLC Questions And Answers July 26th, 2018, 08:42 AM
Replies: 13
Views: 480
Posted By James Mcquade
If he is that worried, use a constant voltage...

If he is that worried, use a constant voltage transformer.
more expensive, but keeps the voltage constant, prevents spikes, brown outs.

james
Forum: LIVE PLC Questions And Answers July 24th, 2018, 04:27 PM
Replies: 6
Views: 307
Posted By James Mcquade
Welcome to the forum.. What versions of...

Welcome to the forum..

What versions of Wonderware are you running?
What version of Windows are you running?
32 or 64 bit?
Did you transfer the license file to the new pc?
was the old pc a 32...
Forum: LIVE PLC Questions And Answers July 19th, 2018, 11:42 AM
Replies: 8
Views: 611
Posted By James Mcquade
I have seen them in the past. several...

I have seen them in the past.

several questions MUST be answered.

1. what it the weight of each?
2. what are you blowing the particles into and do you need a safety barrier and warning area?...
Forum: LIVE PLC Questions And Answers July 18th, 2018, 10:44 PM
Replies: 18
Views: 759
Posted By James Mcquade
there are pros and cons for every program method....

there are pros and cons for every program method.
the trick is to know what programming method is best suited for the job.

one MUST always remember who our ultimate customer, Maintenance!...
Forum: LIVE PLC Questions And Answers July 18th, 2018, 03:50 PM
Replies: 18
Views: 759
Posted By James Mcquade
I feel your pain. 1 program had 14 latch bits...

I feel your pain.
1 program had 14 latch bits and 13 unlatch bits all the same bit, 3 days to figure out what he was doing. we rewrote the program. downtime reduced by half.
another program, I...
Forum: LIVE PLC Questions And Answers July 17th, 2018, 05:12 PM
Replies: 26
Views: 1,099
Posted By James Mcquade
if you are trying to justify costs, that's easy. ...

if you are trying to justify costs, that's easy.

get the costs for the timers, relays, pbs
do the same for the plc
compare the wiring time for each.
compare the programming time versus the...
Forum: LIVE PLC Questions And Answers July 17th, 2018, 02:31 PM
Replies: 9
Views: 362
Posted By James Mcquade
I agree with GaryS, if this plan is...

I agree with GaryS,

if this plan is implemented and the plc dies or faults, all the machines will go down. I wouldn't want to be the one who tells the boss the plant died due to plc faulting.
...
Forum: LIVE PLC Questions And Answers July 17th, 2018, 02:23 PM
Replies: 26
Views: 1,099
Posted By James Mcquade
Yes, it can be done with relays and timers. I...

Yes, it can be done with relays and timers.
I do not recommend it though.

By the time you do all the wiring diagrams, interlocks, materials, wiring and get it running, someone will add something...
Forum: LIVE PLC Questions And Answers July 16th, 2018, 05:30 PM
Replies: 4
Views: 270
Posted By James Mcquade
Brown outs (flickering lights) and then sudden...

Brown outs (flickering lights) and then sudden voltage spikes will do it.
have had it happen several times in a slc and plc5.

install a surge suppressor in front of the plc.

james
Forum: LIVE PLC Questions And Answers July 13th, 2018, 11:19 AM
Replies: 8
Views: 412
Posted By James Mcquade
+1 on vm machines. we lost a hard drive on...

+1 on vm machines.

we lost a hard drive on one of our programming laptops.
installed solid state drive. installed windows and updates.
copied 6 vm's from backup and we were running.
the...
Forum: LIVE PLC Questions And Answers July 13th, 2018, 10:18 AM
Replies: 5
Views: 3,480
Posted By James Mcquade
I will see if I can get permission to post just...

I will see if I can get permission to post just this part.
Don't forget, bit 15 of the word is the sign bit and I don't use it.

james
Forum: LIVE PLC Questions And Answers July 13th, 2018, 10:10 AM
Replies: 8
Views: 496
Posted By James Mcquade
How old is the panelview? have you...

How old is the panelview?

have you considered that the cell membrane is worn out and no longer working?
I have had several that had to be replaced or the button moved.

james
Forum: LIVE PLC Questions And Answers July 10th, 2018, 07:32 PM
Replies: 6
Views: 378
Posted By James Mcquade
I strongly urge you to stay away from any...

I strongly urge you to stay away from any wireless signals.
Why?
you set the machine up in your shop and it runs like a champ, everyone is happy including the customer.
install it at the plant and...
Forum: LIVE PLC Questions And Answers July 10th, 2018, 07:24 PM
Replies: 4
Views: 354
Posted By James Mcquade
if you can see the raw data and it changes with...

if you can see the raw data and it changes with the input voltage, that's good.
question for you, what does the raw data mean?
what units are they in? volts, amps, inches, millimeters?
you need to...
Forum: LIVE PLC Questions And Answers July 10th, 2018, 02:20 PM
Replies: 4
Views: 313
Posted By James Mcquade
Your question cannot be correctly answered with...

Your question cannot be correctly answered with the details you have given.

What is the machine / application?
what is the environment classification?
how far from the control panel to the end...
Forum: LIVE PLC Questions And Answers July 6th, 2018, 03:25 PM
Replies: 10
Views: 645
Posted By James Mcquade
It would be in your best interest to get a upload...

It would be in your best interest to get a upload the current program.
the plc program is the master, someone could have made changes.

1. make a copy of what you have (you don't want to corrupt...
Showing results 1 to 25 of 500

 
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