micrologix 1000

OK I am not so new to PLC, but have always been on SIM.

Now I have a Micrologix 1000, 20 I, 12 O

I wrote a program to monitor 4 inputs. and turn on outputs

1 - turn on relay 1 & 2
2 - Turn on Relays 3,4,5 & 6
3 - Turn on relays 7 & 8
4 - Turn on relays 9 & 10
5 - Run counter, turning on relays 1-10 (when 1 is on the rest are off)

switches 1-4 work great, when that part is the only one programmed
switch 5 work great, when that part is the only one programmed

but when the whole program is in, switches 1,2 & 3 do nothing
switch 4 only turns on relay 10

didn't test switch 5, because 5 wont matter if 1-4 don't work...

Questions are:

1. Why does a complete program STOP 1/2 of it from working
2. how to make this work.
3. as I only know how to make "main prog" is there a way to get main program to load and run other progs in the same PLC....thinking multiple smaller programs would work better then one big one...


if need be I can either upload the RSS, (rslogix) or screen shot my programs.

Thank you all!

Crossfire

Post your .rss file. Zip if first.

here you go. Thank you

Correction:

Now none of the manual controls work (online mode shows the switches trigger, but no output)

but input 0/4 does start the seq program

The problem is the old double coil syndrome. What that means is that you used the same physical output address in more than one place in the program. Because of the double coil syndrome, the counter logic written below the switches logic is overriding the switch logic.

You need to combine your rungs so that you are not using the output addresses more than one time. Search the forum for "double coil syndrome."

never thought of combining them like that!

I am going to try it. thank you


UPDATE: Did it that way, and works perfect!!!

BTW: this is going in my dodge ram! have Halo lights (headlights and fog lights) and will be for a "light show", turning the halos on and off in a circle...

oO Oo
o o

0123
4 5

6-9 are the "eyelashes" and "3 bulb strip" in the headlights (still working on what I want to do with them at the moment!

yeah got bored, what can I say!

It is probably not needed but you could also add a NO (XIC) I:0/4 instruction in front of each of the EQU branch instructions shown in Mark Timm's logic. That would block the counter's effect on the outputs unless switch 5 was on.

yeah, from what I can see, not needed, as I was the seq to be the override to the manuals, not the other way around!

and seeing that switch 5 when off resets counter to 0 and there is no EQU to 0, counter will not make a difference!

OK this is working GREAT with my panel view 600

I am using b0 for my "inputs" on my panel view....how many "inputs" can I make???

Do you mean B3:0/0? In the Micrologix 1000 the 'B' file has 32 words of 16 bits each for a total of 512. Is that enough?

i hope so!!!

seriously though, because my understanding of the bits and files is minimal

so my B3:0/0 is one bit of one word
then my B3:0/1 is one bit of what? same word, or different word?

if the same word, then how do I goto next word
if different word, how do I use the other 15 bits of the word.

all I ever learned was to use a few inputs, and control a few outputs, very very basic.

I used a lot of google to do the S4, and counter and equals in my program!

sorry if I seem like a PITA, but I am coming from a PC/Programming background.

where the PC is live running a program to read/write digitals to parallel port.

this PLC is the first "disconnected" device I have worked on!

Thank you

'B3' is the 'bit' file
:0 is the first 16 bit word. You have 0 - 31
/0 is the first bit of that word. Each word has 0 - 15

B3:1/5 would be the sixth bit of the second word.

If you want to deal with all 16 bits in the word at once - for example to clear all of them - then you can just go up to the word reference. B3:1 is the second word. 'CLR B3:1' would set all 16 bits of that word to zero. Alternatively you can MOVe a word value into B3:x

Thank you VERY VERY much!