thanks okiepc, so i was able to change the instruction types to eliminate the osr faults. that being said let me tell you what i know about the machine im working on so maybe you can help me make some sense of this...
The machine is used to cut plastic from rolls in inch increments. typically around 108 inches or so. in essence an operator hits a start button and depending on the destination value in n7:2 i think, the plc control's a vfd 40 drive which controls an ac motor which feeds the roll to the programmed length,the plc then activates a 24v pneumatic solenoid which cuts the plastic at its final length.and the process repeats...its a seemingly simple machine at first glance, but these plcs have me thinking its not as simple as it looks.
as far as what the ddv is being used for, im not sure, im guessing it has something to do with the background math taking place... in other words, if the 1000 was only capable of counting 16000 pulses or something like that maybe the ddv was making the pulses divide to a more managable number like 16? i dont know its just a shot in the dark, im very new to plcs, but im a fairly adaptable person and learning to program them doesnt scare me.... thank you again you have been really helpful