OMRON Sysmac C20 PLC

[simisteven]

Guys many thanks for this assistance. I owe you big. Parky you are not far from me so I will buy you a pint one day

 

[drbitboy]

...
So yes it is correct but should not be used like this, some editors will not allow parallel rungs like this.

Whoa, my simple script cannot handle that; I'm not even sure if it will fit in the framework! Krud, now I'll be spending the next week making a hash of up-to-now clean and simple code just to cover one edge case. Sigh. 'Twas ever thus.

 

[parky]

@Simisteven, if this is on a running machine I do suggest you think about putting a project forward to replace it, this hardware is way beyond it's useful date & if fails will be a major problem, what I also suggest is if you have some drawings or at least some idea of the bits & pieces that give or require signals from the PLC you print out that listing & pencil in at the very least the I/O comments/symbols, this will give you two things, if there is a problem knowing what inputs may affect any output stopping it turning on will make it simpler to diagnose, if in the event it needs replacing due to failure, will be easier for someone to reproduce the code.