I have a DO6 and I'm wanting to use the high speed counter. The problem is in order to log the data I'm trying to get I need to get about 400 counts a second. It seems like after a certain point it stops counting. Currently I was using a prox switch for the input. I have been able to use this same prox on a different plc and I got the counts that I need Is there another table that I haven't been able to find to adjust the on or off time of the counter?