when i start with pokeys (about 4 years ago) we have many issues with noise ,more with there plugin for the realys cards
at beginning it was real big head ace for us(output was turn on without any command) and they blame...noise.. etc,..
but when they understand we not play games ,they take the problem in there hands improve plug in ,and after several software updates
i can tell you ,about 2-3 years many many cards "0" problems
no noise ,nothing
so this stable issue its real not point for me
about write the plc , i think that if you have some experience ( not much)with write code ,its very easy and much powerful then some patterns that some one build for you(like ladder) but this my opinion maybe some one else think something else
one more point very important for us its remote control ,with windows software its very easy control and debug far customer
if you want i can send you link to see our ATC ( we have all typs,linear ,linear under gantry, carousel by toth wheel and carousel by servo)
also drill block with many drill inside
yaakov