Hi can anyone tell me if this works. I am using the PLC Mitsubishi F series micro-controller. Here is the program:

LDI 401
OUT 450
K 10
LD 450
OR 474
OUT 474
LD 406
OR 475
ANI 411
OUT 475
LD 474
OR 475
OUT 430
END

Ldi 401 is a normally closed switch.
450 is a counter
474= M474
Ld 406 is a normally open push button.
475 =M475
Ani 411 is a normally closed push button.
Out 430 is a lamp


Here goes,wil this work:
The normally closed button X401 will automatically turn on lamp 430 and will not go off. But when the push button X406 is pressed this over-rides the automatic control and the lamp comes on straight away and has a reset button X411 and when this is pressed it will turn off lamp X430.


Thanks

 

Try downloading Internet TRiLOGI from here http://www.tri-plc.com/trilogiintro.htm or LADSIM from here http://www.bytronic.co.uk/ladsim.htm they are both free, allthough the latter is a 20min demo but it is easier to use. I used them both for my PLC course and found them really usefull. You can input your ladder and then simulate it to see whats working and whats not.