About This File
a common use of plc's is for auto motor reversing with a pause between reversals.
Common applications for this include mixers stirrers and in this case a dyeing machine that reversed water flowing through the material to ensure an even dye.
it is written with some nice simple STL code for the auto reversing. It has auto/man mode with a routine to stop fast reversing in manual mode.
It can be easily altered to impliment a timed or counted batch
It is a nice example of simple STL programming.
Written with gx developer V7 - i can convert to other version formats if requested