PLC Programming

Hi,

I have an application that is currently using conventional relays that I would like to move to a Moeller Easy relay/PLC.

See attached schematic.

I have quite a bit of experience programming embedded controllers using C, but ladder logic baffles me. I can handle the UI stuff, but if someone could help me with the logic, I would appreciate it.

Basic operation:

The machine has two pushbuttons to activate two air valves. Pushing momentary button 1 activates Air Valve 1.
Pushing monmentary button 2 activates Air Valve 2 and starts two timers. When the timers run out Air Valve 1 and Air Valve 2 open.
Pushbutton 2 won't activate until after Pushbutton 1 has been pressed.
I also have an "arm switch" which will be an emergency stop button. If this opens, the timers should reset and the air valves open.

If someone could help me out I would really appreciate it.

Let me know if something isn't clear.

Alternatively, are there any cheap PLC's like the Moeller or Omron Zen that can be programmed in C or Basic?

Thank you,

Phil

This is a little on the "simple" side for this forum.

But, if it is a one time deal, here is a website tutorial.

http://controlparts.com/klockner.moeller/easy.programming/

Seems very simple to program. Not to mention inexpensive. You can pick up a Klockner Moeller EASY 512 on ebay for $171.

Could also use a Siemens LOGO

Unless I have drank to much this is how I read the print.
I did it with a ZEN I dont have Moeller software.
I love these zens and am amazed with what I can do with them.
I counted 3 push buttons and a maintained switch.
If the left pushbutton or the arming switch is an "E-stop" make sure it mechanically kills power to the outputs.

If it's not too much trouble, I would like the program for a ZEN-10C1AR-A-V2.

Thank you for your help

Both timers are set at 2 seconds. Double click the timer contact to change the time.
View attachment Mold Press.zip