Onebutton Start Stop Only Use Relays and one button

[Mickey]

Typo it goes between CR1 and CR2

Mickey

 

[panic mode]

Mickey,

I don't think that would work. CR2 works only as one-shot.
It cannot hold itself on...

 

[rsdoran]

The request was explicit...how to wire relays...not program a plc.

I am being lazy tonight so will not offer the answer to this obvious student assignment.

I will state this, there are several ways to accomplish this.
1. The PB needs 2 sets of contact...standard being NO & NC
2. A 4 pole relay...ie a relay with 2 NO & NC contacts.

There are other configurations that will do this but using the above is simple.

Just think a little...once you push the button and make the relay WHAT can break the circuit.

The biggest problem with these kind of scenarios is when you hold/push the button for too long...it can cycle if not done properly.

 

[Mickey]

For you Panic

SOR XIC I:000/0 XIC B3/1 XIO B3/2 OTE B3/0 EOR SOR BST XIC I:000/0 XIO B3/2 NXB XIC B3/1 BND XIO B3/0 OTE B3/1 EOR SOR XIC I:000/0 OTE B3/2 EOR

I just can't seem to post a drawing correctly. It does work


Mickey

 

[Nak]

Come on guys.... it may be simple by using a XOR...

X(
A I 0.0 (pushbutton)
FP M 0.0
)
X Q 0.0 (relay output)
= Q 0.0 (relay output)

that will do the job...

 

[Eric Nelson]

Key phrase: 'Flip-flop'... Get it?...

Why didn't this thread end at post #2?...

beerchug

-Eric

 

[jerrycat]

for the mitsubshi plc try using the alt funtion, when this function is used the first time the input is true causes the output to turn on, the second time the input is true causes the the output turn off,this goes on and on. i would say look in there are no special function in the programming manual that can achieved your goal

 

[elevmike]

Eric,

If you think this thread is bad, Check out This thread!

 

[oldgearhead]

My God, A/B's first tutorial lives on!

 

[panic mode]

Allan is right about the topic but I just can't resist...

For you Panic

I just can't seem to post a drawing correctly. It does work
Mickey

This one does work, but again - only in PLC (CR1 is oneshot...).
Request was to use relays.

To post drawing hit PrintScreen on your keyboard, crop it to
size you want and save as JPEG or GIF for example.
Attache the file (use Browse button) before clicking on
Submit Reply

 

[perfetto]

Dear Panic,
Thank you for your design, Its really good work and nothing to discussion.

I would like to add my contactor sequence is working with 220 VAC classical electrical command technic. Please find it on attach jpg file.