Square D 8003 MICRO-1 Timing Question

[jrwb4gbm]

Originally Posted by The STIG

Sir
Is there a way in WinDLR (My ver.is 5.34) I can test run a program? I looked but did not see anything. My guess is I missed it.

The latest version advertises a Simulation mode. Here is a link to that webpage. I'm not sure if it is completely compatible with the earlier versions since the file extensions are different on the program code.
Link:
http://us.idec.com/Catalog/ProductSe...yName=Software

I haven't tried it. What I do to test a program is change the program PLC configuation to FA-3S which I have. Most of the time it works well enough to test the code.

[The STIG]

Sir
I am working to convert the program to a format the PR3 can deal with. I have a question about two internal relays. One on rung 3 M0020 and one on rung 10 M0021. They are the outputs from the 1 hour timers. I wanted to know what that value should be. Are they some special internal relay I should be worried about?

Thanks

[jrwb4gbm]

They are just dummy internal relays, used as a shortcut to fill a space on the rung. They have no other use. Don't worry about them, just pick an unused "R" address (maybe R420 and R421) to substitute for M20 and M21. Don't use a latch type output coil, just an ordinary output coil. See page 5-6 of th 01A1 manual for the address allocation table.

[The STIG]

That is what I figured because I did not see them any other place in the program but wanted to be sure. Thanks for the quick reply.

[The STIG]

Sir,

I got the program loaded and it seems to be running well. I have been doing tests with a 30 minute cycle in place of the 12 hours.

I did need to make some minor changes to get it to do what I needed.

1st I added a 30 sec delay to the start up. Should we have a power flicker (as we ofter do here in Maine) I did not want the fans starting and stopping till the power was stable again.

2nd I have to use the output from rungs 3 (M0020)and 10 (M0021)as I was not able to get my PR3 to let me load the counter output with out them. Sure it is my error but using the outputs works fine.

3rd the leadership here has desided they want an 8 hour run in place of 12 so I just changed counters C001 and C003 to 8.

I would like to thank you one last time for all your help on this project. I learned alot from your posts and now I feel comfortable using counters in my programs. You saved me alot of time and sleepless night.

Great forum. Thanks again.

[jrwb4gbm]

The 30 second delay (timer TMR 2, rung 1) can work for manual re-start. You may have to hold the button down for the full 30 seconds to get it to work. The use of S and R type outputs for Q0 or Q1 needs to be changed. They will start immediately after power is restored unless they are handled differently. I will add some more code to address that and post it later today if I have time.

[The STIG]

My input 1 on rung 0 is just a jumper (pice of wire)from com to input 1. They want it to power up whenever the panel is powered up. That is why the 30 sec hold for a power outage and the SOT.

It is ok if the counters and timers restart if the power goes out. The system they have in place now does that and I guess it is not causing them any problems.

However I would like to learn for myself how to make the changes you are talking about.

[jrwb4gbm]

Attached is my idea on revisions. I added the following:
1. A standard start-stop type control logic for the cycle start, rung 1.
2. Changed the original Q0 relays to internal M7 (rung 3,4,5,7,8,9,10) and Q1 to M14 (rung 3,10,11,12,14,15,16).
3. Re-located the 30 sec timer TMR2, rung 2.
4. Used the 30 second timer and internal relays to control the Q0 and Q1 physical outputs as non-retentive, see rungs 19 and 20.

I did not add a manual Counter Reset feature yet.

Check your Private messages, button is near top right side of the webpage.

Edit:
As you have indicated in post #22, it will probably work OK for most cases provided the Main Power is locked out if anyone is in the kiln or near the fan motors.
Maybe you might want to add some of the changes shown in the revision attached or maybe not.

[The STIG]

Thank you for the updated ver. I looked at it and am going to study it a bit more to try and fully understand what it is doing and why.

I enjoy this kind of thing and want to learn all I can about programing.

[jrwb4gbm]

Originally Posted by jrwb4gbm

I found a schematic wiring diagram for an Idec Micro-1 interface cable here on the forum. The Idec Micro-1 and the Square D Micro is basically the same PLC, so this interface cable should work. If you decide to build one, the MAX232 chip will substitute for the MAX202.
Link:
http://www.plctalk.net/qanda/attachm...1&d=1149258271

Here's a link to the thread:
http://www.plctalk.net/qanda/showthr...c+micro&page=2

Link to MAX232 chip:
http://www.digikey.com/product-detai...E%2B-ND/947834
Link to Transistor TR1:
http://www.digikey.com/product-detai...ACT-ND/1532789
Link to regulator LM7805:
http://www.digikey.com/product-detai...05CT-ND/458698

Just in case someone would rather buy a cable already built, here is a link to a cable that is a replacement to the original.
Link:
http://www.ebay.com/itm/IDEC-Micro-1...item564743fa94

[The STIG]

Installed the PLC in place of the old relay/timer setup today. Seems to be working well.

I wanted to take a moment to thank you one last time for your help. You saved me a ton of time and I learned alot.

Thank you sir.