Make a pulse generator Rockwell

Hello all,

i know that subject has been already treated.
But i didn't find a answer to my question.

I'm noob with Rockwell PLC (i'm Siemens Specialist) , i need regular flow with applicators electrics (Pulsajet Spraying system). Applicators work with PWM signal.
I have a variable value (speed of machine) and i want create PWM signal with TON proportionel at speed value.
For do it, i thought to make an astable with TON adjustable but i don't know how make it.

i know make it with Siemens PLC but i haven't got same instruction with RSLOGIX5000.

can you help me pls?

(Sorry for my english)

http://www.plctalk.net/qanda/showthread.php?t=54584

Not sure exactly if the above tread will help you.

Regards,

Thank you but it's not my problem. i want create multivibrator (flip flop) with TON variable.

2 timers resetting each other

See this post:

http://www.plctalk.net/qanda/showthread.php?t=29022

Thank you for your reply but TON is always equal to TOFF? so cycle time change.

I want change TON but keep cycle time so TOFF change also.

This may help

Steve

charliminus said:

Thank you for your reply but TON is always equal to TOFF? so cycle time change.

I want change TON but keep cycle time so TOFF change also.

Click to expand...

I'm not sure what your mean, but if you want to have both timers to have the same value just

MOV value T1.pre
MOV value T2.pre

thank you nehpets, i think that i search.

If all you want is a square wave you could just drive a counter with a self-resetting timer and take the output from Tx:y.acc/0.