need help

can i add the toggle switch to change the counter pre-set

What PLC?

Move to .PRE or add or whatever.
oops I did a timer but its the same.

the slc 500
the program has the CTU for single stroke
everytime i need two use dbl strokes i have to use the plc program to change the counter value
what can i do the change without using pc
thank you

dang33442 said:

can i add the toggle switch to change the counter pre-set

Click to expand...

Much more detail required before you're going to get a sensible answer.

PLC type, software, what type of toggle switch, etc


oh, and welcome to the forum.

thank you! Mark
just the ON/OFF swicth
plc 1751 from AB (not sure, but this plc replace for the slc 500)
micrologic 500 software

Well there are plenty of options, you just need to understand what is best for you.

Can you us a toggle switch? Yup.
Can you use a 3 position switch? Yup.
Can you put a button on the HMI (if you have one)? Yup.

Ask yourself this question..."What causes me to have to change the counter? What is the trigger?" Is it a certain recipe/batch that is being run? Is it a certain temperature? Is it a certain pH? Why do you have to change it? Please don't say it's because the operator called to tell me to...well if that is the answer, ask him why you need to change it.

Once you answer that question, your on your way. Is the "trigger" something that is already input into the PLC? If you have recipe information in your PLC and you know recipe #100 needs the single pulse and everything else needs a double.....well use that to toggle between the two modes. No need for additional hardware! See where I'm going?

thnks Paully
my plan is turn the switch to ON, or 1... to run machine at single strike
then turn the switch to Off, or 2...to run machine at double strokes

thank you

thnks smoke
that the only rung i have to add after the CTU

dang33442 said:

thnks smoke
that the only rung i have to add after the CTU

Click to expand...

Come on dang, use a little brain power here.

Do you understand what smoke is doing in that rung?

i really don't
would you help me out?
ty

Do you understand what the MOV function does?

what dose it do?

Look up MOV in the help file of RSLogix 500. Read it.

do you understand what the ---| |--- does in the first part of the rung?

yeah, i think so
it seems like the NO switch
-] [--
or --]/[--